Can A Healthy, Active 82 Yr. Old Who Had A

Can a healthy, active 82 yr. old who had a mastectomy at age 81 1/2 (last yr.) recover from stage 3B cancer? The only medicine I take is 50 mcg. levothyroxine. I recently tried unsuccessfully to take exemestane and now (unsuccessfully) famara (generic!) (There is no history of cancer on either side of the family! -- I am the first (unfortunately to have it!) I had a lumpectomy in 2010 & tried unsuccessfully to take Arimidex for 3 mos., no radiation, & then in 2015, I had a spot on my nipple which was cancerous & a lumpectomy was performed; no follow-up treatment ensued! Following the mastectomy in May, 2016, I had radiation and now am trying anti-cancer drugs. I use the treadmill daily and do all the normal household chores about the house! :) Your advice! Many thanks! Mary