I saw a tip that humming a low, steady n

Short answer first: humming can help, but not because of anything special about the hum. What works is one method held steady for 15–20 minutes. What you described — bouncing an hour, switching tricks every few minutes — is the thing most likely keeping her switched on.

About the hum: a low, steady note is really "a continuous sound with no gaps." Low-intensity continuous sound does shorten settling time for some infants, and it's the *steadiness* that does the work, not the pitch or your voice. You already own the version of this that works: your white noise app. A hum is a fine second choice if her cry dies down while you're doing it — but treat it as the same lever, not a new trick.

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(1) What you tried vs. the better version

Tonight's three moves (18:00–21:00 window):

1. 18:00 — Lower the input, start the clock. Lights down, TV/radio low and constant (not switched off), phone face-down, white noise on low across the room. This house setting *stays the same for all three hours* — it is the one thing that doesn't change between attempts.
2. 18:30 — Feed, then one long settle in the carrier. Sling/carrier, walking, one low hum or one shushing rhythm — 20 minutes, no technique swaps inside it. If she's breastfed, feeding at this point is also legitimate soothing; the goal is rhythm and closeness, not finishing a bottle.
3. 19:00 and 20:00 — Two more attempts, same method first, one change only. At each attempt change exactly one thing: position, swaddle on/off, or method. Not two.
4. Handover rule: when you're at your limit, put her back on her back in her own flat cot, step into another room for 10 minutes, and go back. Set the timer. This is a real technique, not a failure.

The weekly anchor (one sentence, act on it tonight): *From tonight, both of us run the same three-hour evening — same lights, same low background sound, one 20-minute method per attempt, and on Sundays we hand over at 19:30 so each of us gets one continuous stretch.* Do it tonight, keep it for a week, and judge it in a week.

Communication script for whoever's in the room with you (screenshot this):
> "I've got her for 20 minutes on the carrier walk, one sound the whole time. If she's still going at the end, call it and we swap — don't start a new trick in between. If I go quiet, check on me before you pick her up."

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(2) Avoid list

• Never shake her, ever, and if you're at breaking point put her down and walk away — the timer method above.
• No sofa/armchair/rocking-chair sleeping with her. If she's dozing on you and you feel yourself nodding, transfer her to her own flat surface first.
• Safe sleep floor, every sleep: on her back, on a firm, flat, non-inclined surface, empty — no pillows, duvets, loose blankets, soft toys or bumper. Same room, own sleep space, not your bed, for at least the first six months. No smoking or drinking around the sleep; neither parent dozes bedsharing if alcohol or sedating medicine is involved.
• Don't fight the "put down" battle repeatedly. At 2 months she genuinely can't settle herself — needing you is normal and doesn't make her clingy. Let yourself hold her.
• Skip: mystery powders, herbal drops, "gripe water" type products bought online, anyone else's prescription, and changing or giving any medicine without your own clinician.
• No numbers to tune — not sleep hours to enforce, not a nap clock, not a "she should sleep X" target. 4–12 months is a wide 12–16 h per 24 h band including naps; there's no per-night quota to hit.
• Don't let the recording become the job. If it stops feeling useful, stop it.

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(3) Decision tree — screenshot

```
Is she crying?
├─ Just fed, dry nappy, still crying after a 20-min settle?
│ ├─ NOT her usual cry / she seems in pain → call your clinician or health visitor today
│ ├─ Nothing settles her for hours, most days → book a routine check (this can be a growth/feeding/reflux question, not a technique failure)
│ └─ Evening-only, ups and downs, fine other times → normal fussy evenings; keep the anchor
├─ Breathing, colour or responsiveness wrong? → STOP. Local emergency number / nearest emergency department, now.
└─ Caregiver at their limit? → Cot, back, other room, 10 minutes, go back. No technique talk.
```

Stop DIY and get urgent help now if: skin, lips or tongue look blue, grey, pale or blotchy; she's floppy, unresponsive, or hard to wake; struggling to breathe, grunting, sucking in under the ribs, or breathing very fast; a seizure/fit; a rash that doesn't fade when pressed; a projectile vomit; high or low temperature; no wet nappy in 8 hours; or a cry that simply doesn't sound like her normal cry. Call your local emergency number — I don't know your country, so I won't guess a number.

Not an emergency, but book a clinician visit this week if the evening crying is escalating rather than easing, she's feeding poorly or fewer wet nappies, she has a persistent rash, regurgitation that looks like she's bringing milk back up with discomfort, or you feel you're not coping. NHS guidance notes this fussiness typically increases around 2 weeks, peaks around 6–8 weeks — she's right in the thick of it — and usually eases by around 3 months. It is not a cure, and I can't promise one: it usually passes with time and a stable routine, and it often gets worse before that.

What "success" looks like in 24 hours — hold it to this, not to perfect sleep:

• Three settling attempts run, one method each, no mid-attempt trick swapping.
• One continuous block where at least one adult is properly asleep.
• The same three-hour evening, run the same way again tomorrow.

That's it. If those three happened, the evening went better by the measure that matters, even if she still cried for an hour of it.

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Should you record it? Yes — a week of simple notes (time crying started, what you tried, when she settled, rough sleep stretches) is genuinely useful to take to a health visitor or GP, and it's what helps them spot a feeding or growth pattern. Keep it to four lines a night.

If you'd like, tell me your country and time zone and I'll set a 19:30 Sunday handover reminder and a simple evening note prompt. Until then, nothing is scheduled.

One limit, stated plainly: I'm not a clinician and I don't diagnose anything, and I can't dose or advise on any medicine for her, an elder, or a sibling. Anything about medicines, feeds, or growth is your health visitor, GP or paediatrician's call.

Sources: NHS "Soothing a crying baby" (nhs.uk) · La Leche League GB, "Fussy evenings with a newborn" (updated Apr 2026) · NHS / AAP safe sleep guidance (nhs.uk SIDS page; healthychildren.org) — via the sleep-coaching safe-sleep card · AASM 2016 sleep-duration consensus (Paruthi et al.) · white-noise volume ceiling as commonly cited for nurseries (AAP, ~50 dB at the cot).