Hello Dana,
I truly know what you are describing. I had a mastectomy and still had the throbbing, shooting pains in the mastectomy site. I also had pain under my arm and in my ribs. I was told that the nerve endings that had been cut and compromised during surgery and treatment would take a long time to heal. I know it was at least 2 years before the pain subsided. I think I will always have some residual pain in that area, but I hardly notice it anymore.
Be kind to yourself and don't overdo. Lymphodema can be a concern if you don't take care of the cancer side.
We understand and welcome you to the TNBC site.
God Bless,
Lillie