Just like your onc said....but just like chemo, we all have different reactions. I found the whole experience to be a breeze compared to chemo. I had a 7:15 am appointment and went right to work afterwards. The radiation part is easy, 2 zaps and go get dressed. After about
the 3rd treatment, I noticed the breast became tender. Even 5 years later, there is tenderness and firmness. But my skin turned pink and that is about
it! I was allowed to use ivory soap in the shower, and applied deodarant after the treatment. I also used aloe Fruit of the Earth gel for moisture. I had no real fatigue, no burning, no scarring, no other problems....
As for the damage to the lung, the rad onc will plan and map it carefully to avoid as much of the lung as possible. I was told that in my case, the amount of the lung to get hit would be minimal.
Hopefully your experience will be pretty good too.
The anticipation of the treatment is probably worse than the treatment itself...
hang in there!