Baby crying hysterically

My lo is coming to 10mnths.. most of the times she will able to STTN but its been a week whereby she will wake up in the middle of her sleep and cry hysterically , Isit because the room is too hot? My aircon will be set to auto room temp if its too cold. I dont think its due to baby is hungry coz one time she woke up right after an hr to 2 hrs of feeding and will cry hysterically.