Brenda, I know all too well how you feel. Jim and I cringe each time we hear Chris fall in the tub or complain about his knees. We know it's probably just damage, we pray that's all it is. However, this is the child who always fatigued easily, had the "growing pains" in his legs, now has trouble walking with his knees. His MRI was yesterday.
He knows the possibility is there about ms, we've always been open. I believe knowledge is very important. He said something to me the other day that mimicked his father 20 years ago. He said "Well, if I have something wrong like ms, I am going to play sports and do what I can for as long as I can." It took all I could to hold back the tears. It reminded me of the day back in June of 1988 when Jim came out and told me he had ms. He said those very words. The only difference was Jim had the dx.
I too say a silent prayer even though that annoying little voice inside fights my better judgement. I will say a prayer for your son as well.