Is it normal that i think about sex all the time?

ok, im a 21 year old female. ive had sex a lot in my day, but currently i dont have a bf and am not seeing anyone. i cant stop thinking about sex, masturbating, and watching porn. is this normal? and its only lesbian porn... ive never done anything sexually w another female, but i really want to. am i a lesbian? am i a sex addict? just curious? i cant tell.