i m a boy of 19 years old. hav a lump under my left breast for over a month now,i think it happened after some regular vigourous sexual activity with my partner, also i m gay. i took advise from a physician he gave me some medicines some antibiotics but that was of no help , only ear lier it was a little pointed and now its flat dome type,

please help regarding this problem m scared that it might be breast cancer