9mth old Screaming when placed in cot

[Minette5]

Any ideas would be great!
My 9month old goes to bed in her cot fine however she wakes for her 1st night feed and from then on it is impossible to put her back into her cot without screaming. She is fed and winded, so it's not trapped air. I have tried putting her in sleepy and also waiting until she is completely flaked. I have tried waiting out her screams but she wakes completely and pushes up to sitting with the screams getting worse.
The last week the screaming has continued even when she is being held by me, I end up clamping her to me and humming until she calms, she may still wake up or scream in her sleep later on as well. We have moved her out of our room but again no change.
She shares with her brother so you can imagine screaming is not ideal. I am thinking I will put my son in with daddy and I will sleep in his room with baby to try and crack her sleeping in her own cot allowing daddy and ds to sleep but apart from controlled crying I have no idea where to start. (cc doesn't work with her she wakes up properly and keeps going).
So any suggestions however obvious greatly accepted, we have tried many many things, I know the sleep safety guidelines and am not adverse to suggestions that don't coinside with them. I have 2 tummy sleepers! Thanks everyone for reading.

Could be possible sleep regression at that age. My daughter was trouble around that age for going to bed in her cot and she'd been in her own room for four months by then. I just settled her in her cot with a hand on her or sat next to the cot singing or humming, a little bit less every night until eventually I didn't have to be in the room. I could pop her down, give her a kiss and cuddle and then she'd go to sleep.

The screaming whilst horrid, she's not doing it because there's anything specifically wrong most likely, it's because she wants to be with you and not alone in her cot, persistence is key, I would say maybe if the she's still continuing in a couple of a weeks a trip to the GP wouldn't be a miss to make sure there's nothing else going on, but I sympathise OP, it's awful when they are screaming like they are in pain and you don't know how to soothe them x

Have you tried co-sleeping?

I don't think it's sleep regression but you never know, I did also wonder teeth. Thanks for the sympathy I need it lol and I agree I don't think she is screaming in pain.

We Co sleep already, pretty much have since day 1 as she has never liked her cot. But this is a new stage of cosleeping basically I have to hold her still all night! As you can imagine I don't sleep well and it inflames back issues I already have. She will still scream if the cot is butted up to the bed and she is right next to me. Somehow she knows when she is in our bed compared to her bed even fast asleep!

I've not specific advice but can offer solidarity! There's definitely a sleep regression around this time if that helps. I spent last night in a similar battle with my DS2 trying to get him in the cotbed right next to my bed instead of sharing with me, and it didn't go down well....

I think they get very used to the warmth of the bed and being close to you and it's a sleep association that needs to change. Maybe a hot water bottle in the cot first so it's not so cold on transfer? No other ideas at all but best of luck tonight!