Ten month old suddenly not sleeping and bedtime has become difficult

[ZingyLemonViewer]

Please help! My 10 month old all of a sudden is not sleeping. This is night 4 and I have no idea what to do. I’m sick of the whole overtired explanation, I know she’s probably overtired but she was in such a good routine and all of a sudden is not sleeping. She goes to bed at 8 because any earlier she will false start, or at least she used to go to bed at 8! Night 1 she was up at 12:45am until 5am, gets so upset and angry when trying to sleep her, went back to sleep for an hour then was up for the day. Night 2 was very similar. Night 3 she went to bed at 11pm after hours crying in her cot, but was up again at 3am. Naps have been so good today total slept 2 hours and she was on a good path to go to bed at 8pm. Bedtime comes around and again she’s just refusing to sleep. I rock her asleep and 5/10 minutes later her arms are flapping and she’s hitting, arching back, screaming. We have tried everything. Going on a drive etc. I already have PPD and this is making it so much worse any help please please

Overtiredness isn't real - think about what happens to you if you're really really knackered, you don't suddenly stop being able to sleep. What is real is that being knackered upsets them and they get dysregulated and can't sleep because they're crying and upset, not because they're somehow magically different from other human beings.

She might be hitting some separation anxiety and finding the cot difficult (happened with mine around then but it was an absolute red line for me so I ended up doing some sleep training, it sucked), she might need less sleep overall than you're trying to get her to have, she might be teething or ill. It really fucking sucks, I'm sorry. I don't have a magic bullet. Feed Sleep Bond has some good resources, and try to find some way of getting some sleep in the day. I absolutely promise you that it will get better.

Overtiredness isn't a real thing as PP said. it's sold as something by the 'sleep consulting' industry. Undertiredness is a much bigger cause of sleep issues. I personally think 2 hours is a lot of day sleep, mine usually did 1 hour at that age total, sometimes 1.5 hours. I'd try cutting to 1.5 hours total and see if that helps. Are you waking her at a consistent time in the morning? Average sleep needs are only 11-14 hours within 24 hours, so many parents seem to 'try' for way more sleep than their baby needs.