No pain, no gain?!

I woke up this morning from shooting pain on my right side.  I have definitely developed some skin changes--not only from radiation but from chafing during my work out yesterday (oops!).  I met with my personal trainer for the first time yesterday and even though we concentrated on core and lower body exercises, I still managed to do quite a number on my right side and underarm.  It was bad enough that my radiation oncologist had to prescribe a topical medication to use with some special bandages to help with healing.  So not only do my legs feel sore but my right chest is so irritated right now that it hurts to have anything rub against it.  I'm not so sure that old adage "no pain, no gain" is all that true in this case! :-/