When does your 2-3 mo go to sleep?

Mine doesn’t sleep before 1 am and I am losing it. Please tell me I am not alone.

We are not doing any sleep training or routine because we’ve been told that before four months it is useless.

The thing that I can’t handle is the constant whimpering between 21 and till she sleeps. It drains all my energy and really wires me up that I am a mess by the time she is a sleep.