last three nights baby wakes up screaming like never heard before

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had just started to finally sleep though-ish late at 8 months but now at 10 months last three nights waking up screaming and wont go back to bed unless really sooth after milk and stay in room till long gone sleep

wakes up middle of night

teeth? has many already?

mares?

is this normal?

I'm wondering if this is separation anxiety happening?

bump, going through the same thing with my 10 month old. He slept through at 3 months but since 9 months his sleep has gone to pot. He wakes at least 4 times a night and doesn't want to be put back in cot. Have to sneak out the room when fast asleep but 9 times out of 10 he hears me, stands up and cries again. How long does this separation anxiety mallarchy last?! It's killing us!