I'm also 18 wks and started havingn back pain while sleeping.. I was sleeping with a pillow between my legs but the pain still came. So last night I slept with more pillows around me and that seems to help so far. Lol my poor husband is almost getting pushed off the bed, but I need to get comfortable somehow!
I am twenty weeks along. I have major back pain sometimes. Plus I'm now experiencing cramps. Crazy.