will vibrations hurt your baby while your pregnant

No vibrations won't hurt your baby.  There is no evidence that it can do anything to the baby.  You have to figure the baby is in a nice sac of water right now.  They can hear later on in your pregnancy, but it is still muffled because of all the water around the baby.  Also if you are talking vibrators then it is fine I just wouldn't go deep especially in your later weeks of pregnancy because it may cause labor.  If you want this would be a good question for your ob doctor.  They aren't going to laugh or anything and odds are that they probably have heard this questions before.