I have psoriatic arthrits, fibro, and cfs...in august, i got numbness in my left lower leg. A month later, I am numb from my neck to my toes, and cant work. Now, 5 months later, I still have numbness, walking is very difficult, can barely use my hands due to cramping, muscle twitches, spasms, tremors, urinary and bowel problems( due to numbness factor)....doc says I have all the classic symptoms of MS, but 4 mri's of back and brain, spinal tap, emg, evoked response....all show NO MS!! Any ideas? Is it possible to have ms with all the tests being negative for it?? My docs are dazed and confused, and say they have ruled out everything possible.