Third trimester and sleep

I've been having the hardest time sleeping the past few weeks. I'll be 36 weeks tomorrow. I'm lucky to get 4 hours of sleep between not being able to fall asleep and waking up randomly in the middle of the night. This is my third child, but I didn't have this many sleep issues with my other two children 😭

I've tried Benadryl and Unisom but it isn't even helping a little bit. And then when I finally fall asleep, I've woken up after I'd stop breathing and then struggling to catch my breathe again. I know I'm almost done, but I don't know how I can do this a few more weeks with having to work and do everything else during the day.