Sorry to have to welcome you to this site, but glad you found us. I think you will find a wealth of info and help here. You will find though that this site is primarily surgery related - there are a few threads about proton found on the Helpful Hints thread at top.
I had proton at Loma Linda 6 yr ago and have been fortunate to have had no side effects. The treatments were noninvasive and I was not prohibited in anyway from my regular activities during treatments. You can get further info and testimonials on www.protonbob.com.
Each of us has our own set of parameters, so good luck on finding the treatment that is best for YOU and be sure to stay with this forum.