Could this be serious? Answers asap?

I woke up with a pain when I open my mouth it is right at my cheek bone only hurts when I move my mouth any movement it doesnt hurt when I press on the outside I didnt do anything physically to it starting to hurt worse threw the day giving me a nad headack grandma had cancer in jer face amd nrain on tje same aide its justy rigjt side what could this ne