I wouldn't freak too much especially since this is an isolated incident. And since he normally runs a little low, 95/96 really isn't that low. My son normally runs 96 and temps drop almost every night. His drops to 92-93. Alot of other parents I've talked to have had this happen to their children a time or two as well. It also can depend on where you take the temp. If he's just cold, then if you take it under the arm it's not going to be accurate because his body is cold, so therefore his temp will be lower. It can be he getting sick(does not always cause fever.) He can just have gotten cold. But, if you are truely worried then talk to your docs. But, if it doesn't happen again then I wouldn't stress too much. Unless he was having issues breathing then I wouldn't worry bout respiratory problems.We are looking into a possible autonomic disorder for my little one. But, like I said his is an everyday thing. But, I have talked to several docs and they have all at least once told me that some kids just get cold during sleep. Let's pray that's all that was wrong with your little boy.