havent been on in a while, couldnt really figure out which forum to put this in

im early 20s , 5'10, 200lbs., not in shape

been through a few cycles

question: i can feel a knot behind my right nipple, and it hurts, im hoping its not gyno because i havent even used AS in over 2 years

what kind of doctor can i go to, to get this checked out?