Are there any myths or rules about sleeping on your stomach when pregnant?

I love to sleep tummy side down!
I know that after a while it will get too uncomfortable to do so... Last night I felt abit of a flutter in my stomach and wondered if bubs was giving me a kick to say I was squashing them! haha
I am a larger girl, so have abit of a tum already (not sure if any of that is 'showing', but i doubt it)

Anyway - just a random thought I am throwing out there! hehe