Welcome to OCF, Cindy! Im sorry you have been thru so much and have a need for our group. We will help you with info and advice.
I would suggest getting a second opinion, if possible from a Comprehensive Cancer Center (CCC). The physicians will all be working together on your case and make a group recommendation so everyone is on the same page. You are facing some difficult decisions. Our group is fellow patients/survivors and caregivers without medical backgrounds. This makes us able to help you with pointers, listen to you both good and bad and cheer you on. Unfortunately we are not qualified to decide about weather or not to do rads especially with preexisting conditions that could affect rads. While some patients struggle pretty much right from the start, there are some patients who sail right thru barely noticing any side effects. The lucky ones that have an easier time of it usually are the ones who are the best at focusing on their intake and hitting the daily numbers every single day. At 57, (Happy early Birthday

) you have many good years ahead of you to live a good long life rads or not. There are many, many pages of info to learn about your illness on the main OCF pages. This can help you with your decision.
Best wishes with your continued recovery and tough choices.