I Have Recently Noticed That When I Sit Reading Or

I have recently noticed that when I sit reading or writing (or perhaps even while I'm standing) with my head tilted just slightly down, using my arms, I develop a heavy, numb, tingling feeling extending down both arms and into my hands. It's a "pins and needles" feeling. I already know I have a C5-6 disc protrusion. Could these recent changes mean that disc (or one nearby) is deteriorating more and, if so, when should I see my doctor? I cannot take NSAIDS because of renal failure, stage 3. Thx.