I had radiation for a different diagnosis but it really wasn't that bad. The radiation itself is painless and it's very quick. It's the side effects that get you. And radiation is cumulative, meaning, the first week or so you might not notice anything but as time goes on, you will notice more side effects.
Some people experience skin burns. I did not have any of that. I was tattooed to be lined up for radiation every day. At first I was overwhelmed with the idea of being tattooed. They are actually very tiny marks (only you will know they are there) and painless to get.
I wish I could say more about radiation for your dx but I don't know. I am sure someone here will though! Good luck.