Cure Ovarian Cysts

i think i have ovarian cyst since i have irregular period. i havent had my period for 3 months now. if i do have ovarian cyst will i have to have surgery. how do they know if u have cust without a pap smear. is it dangerouse. is there a treatment to help eliminate it. what will the doctor give me to help control it.

please answer
PCOS
WHAT IS THAT
IVE HEARD IT WAS OVARIAN CYST OR SOMETHING

my friend’s twelve. she didnt get her period for four months one time. and i didnt get mine this whole SUMMER for some reason.