Lumpectomy site changes after weight loss

Hey everyone! It’s been a while since I have posted here. I lurk from time to time. I am scheduled for a diagnostic mammo and us in late Oct. I have noticed some changes in both breasts here recently. I went in for a check up with my BS and she said my right (unaffected) breast felt nodular so she ordered the mammo and us. When I got home over the next couple of days I noticed my lumpectomy side seemed different as well. More nodular too. I have lost about 50 pounds and was wondering if anyone has experienced this with weight loss? I am 16 years out from original diagnosis which was stage 1 with 4 to 5 cells in one node. Any advice for when you were diagnosed a second time would be great