I feel your pain awe it ***** so bad :/...I'm 27+2....even when I sleep with pillows nothing help with the pain
Can you sleep reclined up a bit? When you lay on your side, make sure you have a pillow or something under your belly so that your belly doesn't pull the weight on your back. A nice bath helps or swimming.
During the day you can always use one of those support belts to take pressure of your back too!