nipple soreness

Hello everyone I am 9 months on my trt I've had three sets of blood work done, my levels have been good on all three sets the most recent was about 3 weeks ago. Out of nowhere tonight I'm having very very very tender sore nipple on my left side, and I was curious if my estrogen levels are good...

I've been on test cypianate (80 mg per week) and HCG (250 IU every other day) for 6 weeks now. I feel good, and feel like strength is increasing. I've gained 13 pounds, and lost a little BF. One small concern. My nipples are pretty sore, and they are getting bigger. Is that normal?