Please help, driven up the wall. 11mo sleep

[coffeewithmilk]

If I were to tell anyone up until now about my baby's sleep it would always turn heads and I'd be asked how I managed to get my baby to sleep from 6.30pm right through until 7am without waking. My son who's 11 months just loves his sleep and has been a little angel... up until last week where he is waking anytime between midnight and 2am HYSTERICAL
NOTHING CALMS HIM except bringing him into the bed which I really don't want to get into the habit of doing.
I've tried the sit and ssshh method, reassurance, rocking, patting back etc. He seems to get more and more worked up to the point where he can't breathe he is so hysterical.

I don't know why this has suddenly started out of nowhere.
Does anyone have any advice or experience something similar at this age? Is it a leap that he's going through?

Thank you

Sounds like night terrors maybe? I'm not sure if they start that soon. Is he in his own room?

I only ask as my son was in his own room and it meant that when he woke screaming I would check the time immediately and try to leave him for at least 2 minutes if not 3. It feels like an eternity but 9/10 he'd stop and lie straight back down or sort of wake up, look around and settle back down with zero issues. I'd find this harder if he was in the room with me.

First few times it happened I would rush in (it's a blood curdling way for a parent to wake up isn't it?) and that would actually wake him and he'd get upset or too awake and we'd be there for hours trying to get back to sleep.

I don't think they are actually awake for these episodes. It's like sleep talking or walking. But harder to witness.