Suggest Treatment For Muscle Weakness In My Arms

HI I HAVE MUSCLE WEAKNESS IN MY ARMS, LEGS AND PAIN IN MY LOWER BACK ON A CONSTANT BASIS. I HAVE BEEN EXPERIENCING LEFT LEG UNCONTROLLABLE SHAKING, TREMBLING OF THE LEFT LEG & SPASMS WHERE THE MUSCLES LOCK & THE LEFT FOOT TWISTS. I AM EXPERIENCING PINS & NEEDLES IN BOTH LEGS & HAVE A BURNING IN MY RIGHT FOOT. I HAVE EXPERIENCED SOME NUMBNESS & TINGLING. WOULD YOU HAVE ANY IDEA WHAT THIS COULD BE. I HAVE NO REFLEXES IN MY RIGHT LEG AT ALL BUT HAVE REFLEXES IN MY LEFT LEG, WHICH IS THE WORST LEG OUT OF THE TWO