Someone got into my facebook account?!?!?

Okay so today when i tried to log into facebook it said my account was locked and tht someone from a dif state (it gave me the location) logged into my fb account so then it requested a pword change so i changed it. Now i am really worried i dont know what to do bc if i deactivate my account they can just reactivate it by signing in and it has a lot of info on it im only thirteen and im soooooo worried idk what to do bc idk if tht facebOok security thing tht asked me to change my pw was even fb i think it couldve been a hacker plz hlp me i am rlly scared!!! l