Hi. I have similar diagnosis and staging and finished six cycles of chemo in may and the 25 fractions/ treatments of external beam radiation last Tuesday. I will finish up with three brachytherapy treatments mid august. The external beam rad was easy and only had minor side effects. If you decide to go forward follow their prep to the tee. I drank water 45 minutes prior which helps to move organs out of the way as much as possible to lessen rad to other organs. My rad onc was very clear on potential side effects but to me the fear of recurrence was greater. My rad Onc says that usually when it recurs it is at the cuff hence the brachytherapy. I fully understand your concerns and am not sure this helps in any way. Take care