Hi Amy!
I know what you are going through as I was on the same boat about 2 years back....diagnosed at the age of 23,unmarried & about to begin my career.I too thought it wasn't fair as I was a non-smoker,non-drinker,healthy eater & etc but I learnt that this disease can strike anyone at anytime & you gotta be as unforgiving to it as it is to you.
From day 1 I told my doctors that I didn't want any statistics as I felt each & every case is individual & generalized figures cannot determine which side you'll fall into.
Ofcourse it's your decision whether to go through radiation or not,but I'd like to mention that the radiation experience is not the same for everyone,I was petrified of starting it,but it wasn't too bad at all....the side effects didn't hit me until after 4 wks & overall it wasn't nice but definitely not the experience I'd actually dreaded...I think I got more sick by worrying about the radiation than the radiation itself.
Take care.
Luv Jill