Caveat: I know my DD is not a bad sleeper; compared to many she is amazing and we are very fortunate.
My DD hit the 18 month sleep regression on cue with much hysterics at bed time. We had a few nights of walking her to sleep (1 hour at time!). We also, at the same time, had issues with her refusing to eat in her highchair. As a result we moved dinner to 6 and milk to 7 (previously milk at 4.30/5 and dinner at 7) and introduced a biscuit with milk and a count down to bedtime. She had, up until tonight, in the main been going down without issue. We lay her down awake with her dummy's and she settles (as she has always done)
However 8/9 nights out of 10 will wake between 12:15 and 14:00 she wakes and will will not settle back in her cot. We normally just put her in with us and she drops off.
I don't mind her in with us but now its almost every night I'm trying to figure out whats going wrong so I can reclaim my bed but more importantly help her get an undisturbed nights sleep!
Last night she would at 12:30; laying her back failed in an epic fashion so I put her in with us and she dropped off quickly. I tried to move her back to her bed once she had dropped off (which sometimes works) - didn't go well. I tried sitting with her for an hour (something i've never done and would rather not do) but the minute I moved she sat up crying.
She no longer asks for milk so is not hungry
Her room and ours are equally dark; she has a night light which we had started to put on time but seems to prefer it on
She's not cold as she has kicked her duvet off and she won't have a blanket over her in with us
She has a 1 - 2 hour nap during the day from 11ish - 1ish and goes up at 7:30 / 8:00, she normally sleeps till 7. She settles fine when put down normally so its just the re-settling when she wakes in the night!
Additionally on Sunday we removed the sides from her cot, in itself this has gone well but last night after going down fine she was up and screaming at the stair gate within 5 minutes. We took her out for a drive and I transferred her asleep - the minute I left the room she was up and screaming again and was still awake at 21:20 wide obviously tired but fighting it.
We ended up with her between us but she thrashed about till 22:30 - totally unprecedented.
If anyone has any ideas I'd be grateful!