Sleeping with huge boobs

Has anyone else been finding your belly isn't really the issue it's more your boobs when you're trying to sleep? Mine constantly feel like they're trying to fall off of me. I was a 32 DD before I got pregnant and the other day the lady at the maternity store measured me and told me I was a 32 F, which I didn't know existed. Anywho, anyone have any tips on sleep comfort with huge boobs?