Joanne, Your case sounds very close to mine in terms of IDC, HR/PR+ and size of tumor (minus the heart issues). After my lumpectomy the surgeon told me that what they removed was actually smaller than 7mm tumor from original sonogram. He suspected that biopsy removed most of it. The hardest part of my recovery was from the lymph node removal. I can’t speak to total mastectomy recovery. If lymph nodes are negative then you likely will not need chemo. I had 21 rounds of radiation. No issues except skin irritation and now I’m on Anastrozole for 5-7 years. My surgeon at Moffitt told me that he won’t remember me 6 months after surgery, which is a good thing because my case was so low risk compared to what he normally deals with. When you go there you will be very humbled by seeing some of the other patients walking around that are obviously dealing with far more life threatening cancers. I printed out Joshua 1:9 and taped to my bathroom mirror and I had a lot of people praying for me. Memorize that verse and keep repeating it to yourself during your journey. I will keep you in my prayers.