End of pregnancy insomnia

Ariel
This end of pregnancy insomnia is stinking killing me. I am 39+5 and for the past couple weeks, sleep is so hard to come by. I take Claratin for allergies, so I can't take Benadryl on top of it, and even when I have taken some to try to sleep it doesn't work. It's frikken 3am again and I'm still up. I'm laying here next to my peacefully sleeping husband and two cats. I'm so jealous of their sleep! 
This is not a good time to not get sleep because when I do finally go into labor I won't have the damn energy to do it. Any tips for getting to sleep? I went from being to sleep all I wanted for many many hours to a few crappy ones here and there. Blegh