Isovue-370 and imaging center

I had a CT scan with Isovue 370. About one week to ten days later, I abruptly started with severe pain, burning and tingling in both legs from about 2 inches above my knees to my toes. Had 2 bouts of cystitis symptoms five days apart. Was checked for infection- had none but had blood in my urine. I have had an EMG, x-rays and an MRI and the doctors find no reason for all this. I have been on Neurontin for 7 mos for this condition and am getting no help from the medical profession. My GP says it couldn't be the Isovue 370 but a neurologist says- probably was but doesn't know any treatment. Please help- it is so painful and I am having trouble walking now.