@WhiteLight I am so sorry to hear about the discomfort you had after radiation therapy - it sounds uncomfortable and must have left you feeling a bit depleted.
You’ve asked a great question. As @Afraser said it will be useful to ask your oncologist’s advice especially after you outline your history.
I wonder if this podcast about hormone suppressing therapy, including Aromotase Inhibitors on the BCNA website, might be used to you? It helped me understand the pros and cons.
https://www.bcna.org.au/resource-hub/webcasts/hormone-blocking-therapy-is-it-worth-it/