He got his shots yesterday morning. They always say it's possible for them to develop a fever but he didn't the first two sets of shots he got. We came home after his shots and we both took a nap. We went about our day as usual. He went to bed well tonight. He woke up at 215am. I watched him for about 20 minutes on the monitor lying there babbling ma ma ma mammmmmmmmaaaaaaa. Then he got fussy. Changed his poopy diaper and when I went to feed him I noticed he was really warm so I took his temp rectally and it was 100.9 (38.3). He snuggled with me for a while until my husband got home from the tavern he works at and then he got all excited to see Daddy, babbling, squealing, etc. I just put him back in his crib and he's playing happily. So here are my questions... Is it common for them to react to some shots but not others? He got the same shots as the last two times but didn't react to those. At what point is it considered a high fever and I should call the doctor? Does it normally take that long to develop a fever from the shots? (14ish hours) sorry. This is his first fever so I'm being paranoid!!