The body pillow works beyond wonders, especially when you get big ! But I'm the meantime, don't stress about sleeping positions. You can sleep on your tummy as long as it's comfortable ! Your baby will let you know if they don't like it (: I'm 39 weeks and if I lean on my tummy too much, he'll push out on where I'm lying and I move for him (: What you don't want to do is sleep on your back, because it cuts blood flow to the uterus ! Don't worry about your tummy
Ok. Ive heard body pillows help. But i rarely sleepy with a pillow at all. Have you tried one??
Just try sleeping on your side with your hand under your belly. I usually can't sleep unless I'm on my belly but I started doing that and sleep great.