Playing football with a bad back....

Right now I'm in my sophomore year in a quad A HS team. Last year I joined the team late in the season, but due to my sadiac nerve acting up I had to sit and watch the practices. Now I'm faced with quite the delema, the doctors diagonosed me with congenital spinal stenosis with 2 herniated discs in my back, not good for a 15 year old...
I really want to play football this year and plan on doing so, my major problem is injury, my doctors have only seen 1 or 2 other pateints like me. Have any of you seen or had this problem? What are some ways I should prepare myself? I've been working out for the past 4 months, 5 days a week, I just need some reassurance