gyno?

i’m 16 and i have a gyno appointment next week. i have an irregular period sometimes i get it two weeks apart sometimes i don’t for over a month and then when i do get it my cramps are so bad and i break out only the week of my period. i’m sexually active, but recently i haven’t had protection. what would the gyno do with this information? would she put me on birth control? would i get it right at that appointment?