I've been concerned about this as well but my situation might be different. I think that if you're really concerned, you should call your ob for a quick check. It wouldn't hurt. I'm sure that you're fine - every pregnancy's different. I have to keep reminding myself of this! - jennifer (23w5d)
I am 19w pg and I only feel the baby after I eat.. I think all are different and you the positioning too... don't worry