Help sleep while pregnant! Help!

I have real bad insomnia before I got pregnant and when I found out the doctor took me off of everything and my only problem is sleeping. I can’t fall asleep or when I do I wake up every 2 hours and then feel like I never even slept. I’ve tried everything. Melatonin, Benadryl, unisom, sleepy tea, warm baths at night before I went to bed. It’s just I feel like it’s impossible. I’m 20 weeks and I need something to try and sleep tonight if anybody can give me any ideas. I already called my doctor to make an appt for this too but it’s not till end of April.