Belly sleeping?

Amber
I've heard you're not allowed to lay on your back. I usually can only get comfy (now a days) on my side with my leg all the way out so sometimes in leanin a little on my belly. Is it okay to lay like that aslong as your belly isn't hurting? It's a dumb question but every time I lay comfy the baby kicks where my belly is on the bed idk if he is like mom you're squishing me or what... But my legs usually take the pressure off my belly??