I would definetly change your bras if you havent already. I went up a cup size and got new ones, much better already. Considerd getting a bra for bed but not so bad anymore so I didn't bother. I do have to say I am finding a maternity bra more comfortable than just a reg bigger sized bra. Probably designed for holding up boulders more.

I would also suggest trying to train yourself to sleep on your side 'cause your going to have to anyway.