My 9 month old seems to be going through separation anxiety all of a sudden brought on by a recent vacation where he was totally off his schedule. He's OK during awake time, if I leave the room for a minute he'll cry but immediately will stop when I am back. Naptime and bedtime are a disaster now though. He screamed for 2 hours straight the other day when I put him down for a nap and would have kept going but I called it quits and went up and got him. How do I help him through this period? So far I've tried staying in the room with him and that had him screaming and reaching out at me for an hour before he fell asleep. Anyone with this experience have any other advice?