I think about it, but know there's nothing I can do and worry never helped anything. BUT every time the kids mention a discomfort my fear flares. Then I calm down as I realize - that's a cold or sleeping in the car aches during Senior Prank night.
I was 46 when DXed, a very healthy active kid and adult, but the worry flares up on occasion. When I feel down, I always think "but better me than one of my kids." I still want to keep them safe every moment but know life won't let me. Being a a Mom is hard enough, being a Mom with MS is really hard.