I'm 34w today & for the past two weeks I have been hearing popping noises coming from my stomach? It sounds like the kind of pop you hear when you pop your knuckles or your wrist. And it happens randomly, when I'm moving, when I'm laying still etc. My son is moving around as much as normal, and I think everything is fine. I don't go back to the OB until the 7th. Has anybody else had this happen?