possible gyno? not on/have never done a cycle

[Mud Stuffin]

I'm 19, I have used no steroids, no Ph's, no AI's, SERMS, etc. The closest thing to a testosterone booster I've used was a ZMA supplement i got with a protein order a year or two back, needless to say that didn't cause it. I'm roughly 9% body fat, i eat and sleep enough and work out 5 days a week.

about 3 days ago I started to get a lump slightly under and kind of behind my right nipple, it's not visible but it's sore to the touch, hard and roughly pee sized. I'm concerned that it may be a freak natural occurrence of gyno (unusual for my age i believe?) or something worse.

I think my options are basically see a doctor about it, or try the letro reversal from this thread http://forums.steroid.com/showthread.php?t=236880

so here's the question, what should i do?

and also, is using letro at my age a bad idea? I always here about how AAS will screw up your htpa, does the same go for a strong AI? is it going to do more then just repress my sex drive since i'm not on a cycle?

thanks for the help