Back rubs help a little. I slept sitting up with pillows behind my back. Some say its from heartburn, I had acid reflux late in pregnancy others say it's from increasing breast size. All I know is it hurt like hell and I slept with a humidifier and Vicks to help with breathing ( that is because all your organs are all basically up in your ribs and pressing on your lungs). On the bright side, you only got a few weeks left :) I hope you feel better!

I never made it that far with my first... but my husband raised the head of our bed so it would take pressure off my chest!