neuropathy related to cervical laminectomy and fusion

Starting days after my surgery I started feeling sort of a cold feeling in my feet. Now after four years I experience burning from knees down all the way through my feet along with weakness in my legs and limited mobility for certain movements in my legs. Tried gabapentin didn't do a whole lot. I am now taking lacosamide and it doesn't seem to be a whole lot either. I don't know if PT would help as I have gotten aggravated and somewhat lazy through all this. Any advice or help would be appreciated.