Third trimester insomnia. Slept only a few hours last few days.

Can someone please help I have tried everything. I have only slept a few hours since Thursday night. Unisom and benadryl haven't helped they just make me dizzy and uncomfortable. I don't know what to do. I get exhausted and fall asleep at a random hour of the day and then wake up after only sleeping for an hour or so. I can't sleep at night at all I just lay here for hours and hours 🙁