I had similar experience with second lumpectomy. Had low grade infection--took antibiotic and that cleared. No radiation. Anastrazole for 3 years---lost calcium in bones, other side effects. Discontinued anastrazole at oncologist's urging. No further meds. Now 4 years post first lumpectomy. As these posts often say, we each have individual responses. No 2 of us are alike!
So glad you are feeling better. Prayers for you and family.