Sleeping on my tummy?!?

Shannon
 I am a stomach sleeper, I always end up rolling over in my sleep on my tummy. I am almost 19 weeks but I don't have a baby belly yet. Is it bad to sleep on my stomach? Can it hurt baby? I am stressed because I can't sleep any other way . Today I went and got a body pillow and I am laying on my side/stomach but I don't know if it is any better? Help?!?!