i am also a tummy sleeper, when i was pregnant with both my kids, it was torture the last 20 weeks.......i favored my left side with a body pillow propping baby bump and a pillow between my legs to keep my hips from hurting much...... and afterwards when i did breast feed sleepin on tummy doesnt really work cuz you will wake up in a big puddle of milk... wear breast pads i even doubled up.