Waking up at 1,2,3 am when I have to get up at 5 am

Jazzmine

I am 23 weeks and 3 days and I have been waking up any where from 1 to 3 am and not falling back to sleep before I have to get up before work for the last 4 days. Anyone know what's that about it makes me exhausted by 4 in the Afternoon and all I want to do is sleep but I try to fight and stay up so that I don't wake up like I have been for the last couple of days. It's a struggle lol