My DD is 1 and for the first 7 months she was a great sleeper - slept through by 3 months and now goes to bed fine. However since Christmas it has just been stop/start of sleeping through one week then waking up throughout the night the next. I do not understand it we are not doing anything differently - a few times I can attribute it to teething but last night she was fine. She went to bed at 7 - then was up at 2,3,4, before I eventually caved in and gave her milk at 5. She then went back to sleep until 7.30am. We have left her for cry (no longer than 15mins then going into to check) this makes her more hysterical if I pick up and put down. I am starting to get frustrated at her which makes me feel like a crap mom as I know it is not her fault but I just don't understand why she is fine one night then like this the next. Also because she was sleeping so well last week we decided to drop her morning bottle and she seemed fine with that and now it feels like we are back to square one. Anyone else have exp of this?