staying asleep

Claudia
I'm 13 and half weeks and I've been having the hardest time staying a sleep some time I wake up in the middle of the night for a good 2-3 hours! I work 8 hours a day so this is really taking a toll on me. I've had zero morning sickness but this sleep problem. My doc told me to take unisom but that helps me fall asleep but not staying asleep anyone else with this problem? Any tips? FYI - this is an every night issue - I'm desperate