My legs & feet; numb, weak & tingly. Painful to walk @rest, both feet throb then go"numb". Is this bc of the L2/L5/S1 fracture and DJD in my back.

Yes. Fractures and DJD do not cause nerve compression by themselves. However, it can cause slippage in the back and also chemically irritate nerves which will compress nerves leading to numbness and tingling and eventual weakness.
It certainly could . be. The weakness is particularly troublesome. U need to C ur treating Doc. Get his nurse on the phone and describe. .