Possible Gyno

I just finished up a 3 week m1t cycle and the last 2-3 days i started noticing some slight (very slight) sharp pain in my left nipple. i was wondering if this is gyno... i havent noticed much in physical appearance... it seems my left nipple is a bit more puffy then my right ( i believe it may have always been like this ). anyway... if it is gyno, since its so slight... and since i stopped the m1t... will my anti-e get rid of the pain and the possible tissue that may have formed? thanks.