My son has been running a fever since Friday, yesterday, and he has crazy diaherra.  He recently got his shots on Tuesday and also the rotavirus oral vaccine.  I know that they can get diaherra and fevers from the shots and vaccine.  My son has had nothing but small diaherra diapers and this morning had a couple wet diapers along with those.  He seems to be in great spirits as he babbles and talks and makes faces, like he knows it hurts but he is strong.  My only worries are his poor bottom rash and he today hasn't drank a whole lot.  Probably 7 ounces during the day- he drinks that in one feeding.  He seems to have a small appetite but it's not as he usually is.   I'm just worried that he is getting dehydrated with his frequent diaper changes compared to his intake of formula.  He has a wet mouth still but he seems to be always tired, which I know may just be his body fighting the vaccine.  IM JUST REALLY WORRIED! FTM.