I ran a cycle back in the spring which ended in mid-march. I did proper PCT which ended about mid april. About 2 weeks ago I started to develop what feels like gyno in my left nipple. It's a hard painful marble-sized knot. I wouldn't think the cycle would affect me this late especially since I did proper PCT. It feels like the knots I had when I was about 13, but they went away. Any ideas on what is going on?