Hi! My DD is 9 months old. We rock her to sleep every night and when she wakes in the middle of the night she ends up in the co-sleeper in our bedroom. We tried the Ferber method of sleep training (baby cries it out but we check in her at increasing intervals until she falls asleep). First night she cried 30 mins before sleeping. Second night only 5 minutes. But after that she started crying a little longer each night. What really concerned me was that during the day she wasn't herself anymore; less smiling, less laughing, less talking, more fussy and clingy. The change got worse each day. So we ended up giving up on the 5th night because the crying had increase back up to 20 mins and was much louder than before and because the drastic change in her personality caused me anxiety. I was afraid the sleep training would change her personality permanently. Anyone else have a similar experience but eventually had success sleep training?