Sorry to hear this. Get a second opinion from someone who specializes in this type of issue. Call Louie Simmons and see what he says. Take some time off from squatting and pulling and work your torso in other ways. Build the stabilizers up. Get some soft tissue work done on your back and glutes. Talk to chiropractors who deal with strength athletes. Just don't accept your initial diagnosis without a fight if it means that much to you.
Raw Elite Total at 308