11 monrh sleep regression?

Bxne

Hi,

Is there such thing as an 11 month sleep regression. My baby girl usually sleeps all night from 6.30 om until 6.30 am but the past 2 nights she will wake screaming after an hour and will not go back to sleep for a long time. She is teething but I don't think it's that that's keeping her awake. It seems to be something else.