Dd is 21mo and has always been an ok sleeper but in the last month I suspect I've done some wrong by her and she is now taking her revenge 
She goes to bed at 7.30 and falls asleep well.
Wakes at 1ish and lays there crying until I come in and shush her. Falls asleep quickly.
Wakes at 5ish and lays fake crying (it's not a proper cry, I can tell she has to put energy into doing it) until I go in. She then needs me to lay with her until she drops off again.
It's the 5am wake that's killing me. I can't get back to sleep after this and being 12 weeks pregnant I am running out of energy quickly.
I just don't know what to do so any advice welcome as I'm close to throwing her out the window (kidding).