Sleep deprived

I was just wondering if someone knew of a magic potion or something to help me sleep?😂 I'm 37 + 2 weeks today and I cannot sleep much, I'm so tired! I've been using all sorts of different pillows and taking tums for acid reflux and I manage to sleep for like 2 hours during night time, 4 if I'm lucky and it's never a deep sleep. Other than that I'm up at 3 am until sunrise. Can only sleep a bit later during the day again. Trying to get more sleep in before baby comes - if that's even possible right now. I'm really desperate.