I had the same treatment a year ago & had some bleeding this September. When I was checked out, the doctor said things looked good & that it could be due to the fact that I'm postmenopausal &/or that the vaginal walls are much thinner now (due to the menopause & the radiation), so some bleeding may happen.
Personally though, I would certainly see the doctor about it. Do you still have your cervix?
I would talk to your doctor because that is always one of the first questions they ask me - any bleeding? It may be nothing but always good to be safe and check. I’m 2 1/2 years post radiation and brachytherapy as well.
i would go and get that checked out. I spotted once or twice 6 months after my hysterectomy and my GP gave me a complete pelvic exam and took swabs. Everything was OK, but he was glad that I had it checked. Good luck, and I hope it's nothing, but please check it out. Joan.