If you didn't land on your stomach, baby is probably fine. He/she is floating in the amniotic fluid and still has lots of room. Probably just seemed like a little bump to him/her, if anything. If you're still concerned, you could always give your doctor a call.
Your body usually has enough protection around the baby and as long as u didn't land on your belly- you are probably safe. If u experience any cramping or bleed then go to the er