Why Am I Having Facial Hair On My Chin And Upper Lip?

Hi my name is lekea I'm a 21yr old female and I have had irregular periods from the age of 11 to now I have facial hair on my chin and upper lip. I also am haveing thinng hair really bad the lastg couple of years and was courios if I have pcos. I also have truble loseing weight and. My weight goes up and down...