Question about gyno

[nytmare021]

About a year ago I was doing flat bench dumbell press's and dropped the weight pretty hard on my chest. A few days later my nipple was extremely sensitive and sore to touch. This went on for roughly a month then kind of went away. It is still sensitive here and there but now I have a nice size lump under my nipple and its kind of odd shaped (this may be in my head). It isn't like I have a lemon wedged behind my nipple but there is definitley a lump/mass under my left nipple where I dropped the weight. I was on a cycle of spawn when this happened if that makes a difference. Could this be gyno or just severly bruised tissue that keeps building up. I've ben putting it off because my insurance is complete crap and going to cost me a boat load but I think it may be time to get it checked out. Any ideas?