Funk (I am in one!)

I had an MRI on Wednesday and the doctor called today with the results: a stress fracture + the ITBS. He said I could run the marathon if if I want but I need to take 6-8 weeks off either starting now or after the marathon. I had a fairly decent run last week, but I'm still not running as well as I was before the injury. I need to make a decision. I know the right choice is to sit it out, but it's so close! I also don't want to have a lame first marathon experience by not running it as well as I know I can. I also don't want to miss out! It might be time to consult a magic eight ball...