Why won't she go back to sleep

[Justkeepswimming91]

I have a 15 week old baby who wakes up usually between 3 and 5am for a feed. The problem is once she wakes up she will not go back to sleep. She sleeps just fine (touch wood) from around 7pm until her 3am wake up.

Have her sleep less during the day.

Put her to sleep later

Because she's a small baby You'll get loads of varying advice, but the truth is - it's a phase and she will grow out of it in a few weeks, or even by tomorrow, who can tell. You'll then be wondering how to fix her next "phase".

I have never put either of my 2 into a routine, I let them do their thing. With both of them they were sleeping 11pm-8am from a week old.
My 13week old feeds at 9pm, stays awake until 11pm, feeds and then sleeps until whenever her 2 year old sister wakes her up which is normally around 7:30-8:30ish
My 2 year old sleeps from 8pm-8am.
Being a few months old is way too young to have a strict routine. It's good to have a bedtime routine, e.g. bath, book, milk, bed etc

Hope you get some sleep soon op!

Same issue here with a 23 week baby. Tried going to bed earlier, going to bed later, seems nothing works. I'm just waiting it out like others suggested.

Because she’s a baby, that first stint is amazing!