@staton. I too like you had a lumpectomy to the left breast. I am due to have to my last of 15 treatments in around and hours time.
So far just some fatigue.slight reddening of the breast and some occasional stabbing pains otherwise all has been good. I only used the sorbolene given to me by the Hospital and some gentle baby wash and haven’t had an issue with dryness. I wasn’t offered the option of 5 treatments, which I might of taken as I struggle big time with the breath holding 🤣. I wish you all the best which ever option you take.