Plan a sleep routine experiment for a baby or child

Plan a sleep routine experiment for a baby or child.

Age: [age]
Current pattern: [rough]
Constraints: [feeding, work, shared room]
What we've tried: [list]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. A gentle routine experiment for 1–2 weeks.
2. What to log.
3. When to contact health visitor/GP/111 (breathing concerns, significant weight worries, you're not coping).
4. Explicit: not a medical sleep programme; follow clinical advice if given.
5. NHS baby/child sleep reading pointers.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent diagnoses, doses, calorie targets or treatment plans. This is help with preparation, planning and wording, not medical, diet or treatment advice; check the NHS website, speak to a pharmacist, or contact NHS 111; call 999 if it feels like an emergency. UK English.

Stay in this ChatGPT chat. Do not turn on apps or connectors, and do not use memory from another chat.