Im Experiencing What Appears To Be Foot Drop And Severe

im experiencing what appears to be foot drop and severe numbness and weakness in the outside of my left lower leg made extremely painful by muscle spasms and pain in Achilles tendon area upon walking. also pain in the top rear of left leg and. ive had a spinal fusion and disc replacement in L3-L5. I am also experiencing severe debilitating shooting pain from my neck into my head possibly pertaining to another spinal fusion and disc replacement in C5-C7?? one more...severe weakness in left arm with chronic muscle spasms