Not being able to do the things you once did with your children must be hard to deal with. And it is obvious your son misses your involvement. Maybe you could tape his games, then both of you watch them so you can point out to him all the good things.. sort of home coach him? Give him the benefit of the experiences you have from when you played. And it will show him you are interested... involved. Just a thought, and far from a brilliant one.
I was blessed with ability to sleep through anything, even my pain. My sympathies to any person who doesn't have this gift. I've heard that loss of sleep is far more detrimental to our overall well-being than we realize. That one nights disturbed sleep takes 3 - 4 nights good sleep to recoup. So, sleeping pills, OTC or prescription is something to look into. As for pain... TENS systems.. although I don't know if they would have any effect on deep, internal pain. Back pain.. that I can relate to. I swear by chiropractic treatment. Used to think it was hocum, know from 1st hand experience it works. Holistic or alternative treatments should be explored. Many folks swear by cannabis. I know that cigarettes, although lethal in the long run, both stop my bleeding AND ease the cramps from all of my scar tissue. Basically, you have the right to do whatever it takes to get you through.