@colleenyoung thank you so much, I appreciate it.
I will definitely follow the doctors’ recommendations, and I start the first of five brachytherapy sessions, as scheduled, next week (6 weeks after the hysterectomy). I have been unable to find anything on women with IC who have had brachytherapy, even through several IC networks/associations, but I suppose it doesn’t matter because I’d rather lower my risk of cancer recurrence (doc says by approx 10%), even if it causes the IC symptoms to worsen long term (and it might not fingers crossed). Thanks again