Crisis of faith

I'm having a crisis of faith. You see, I have a couple of herniated disks and over the summer I did something that exacerbated one of them. My physical therapist encouraged me to continue yoga while he helped me get the pain under control. And after a month or two, the pain was under control—but still present. Then I went to California to visit the 'rents, and I got the flu, and I stopped doing yoga for a couple of weeks—and the pain went away. Delighted, I headed back to yoga two days ago, and the pain returned. Went back again yesterday, and the pain got worse. As a true believer, I think yoga is the answer to every question the universe poses. So I'm going back to yoga today, and if it puts me in a wheelchair, well, by god, I'll do wheelchair yoga. But I do wonder what I'm doing wrong, and how I can do it right. Giving up yoga is not an option.