please help. my 3 month old grandson screams bloody-murder at the top of his lungs out of the blue. he will even do this in his sleep. also suddenly he has started screaming while riding in the car. he used to enjoy rides. my daughter and i just cant seem to figure out what is going on and the doctors are NO help. they pretty much make her feel like she is a worry-wart new mom. we are recently changing formulas and someone thought that maybe that was it but he has done this even while he was nursing. can someone please guide us???? thanks-- mary jo