Yoga Supplies

My "specialist" doctor recently told me I had to quit running and weight lifting because I have degenerative disc disease.
What yoga poses should I avoid?
Almost overnight, I’ve lost my ability to comfortably do forward bends, plow/wide-legged plow, and knees to ears.
I’ve already had surgery for a blow disc (L5-S1), but this pain appears when I run (or "power walk as I do now).
I also have flat feet.
His diagnosis is killing as I derive tremendous pleasure from running.
As per the "Posture Presription", I know longer sit in chairs. I only squat or kneel at a desk.
When sitting on a couch, I sit in cross legged postion with a lumbar roll.
I do a 90 minute yoga session in the a.m., and a 30 minute one in the afternoon.
As per the "McKenzie Method", I do cobra/backend every two hours.
In other words, I do all I can to improve things.
Nevertheless, the pain the area of my traps appears when I walk or run.
Thank you.

www.google.com has a great deal of information that you could use to find your answers , while yahoo answer is more likely to be better for people’s opinions.. thanks.