Side and back pain! What helps?!

The past two weeks I've had pain building in my rib area on my back on both sides.  It's no sharp pains or contractions, it's a soreness and throbbing that I can feel is directly related to the weight of my belly pulling down.  Last Friday I even felt a muscle literally pull just from sneezing and it got even worse.  Since then can't sleep on my sides because of the soreness and can really only get comfy from propping up on pillows.  Anyone else dealing with this??  If so any recommendations?  I am almost 32 weeks.  Been doing Epsom salt shallow warm baths at night, alternating some ice packs, and generally trying not to lift my toddler too much.  I know this is kind of a boring post, but please if anyone has any insight it would be so appreciated.  I never dealt with back issues with my son.