I have equal numbness in both feet and legs and moderate calf pain. I need to know what is causing this???

I crack my neck quite a bit. I am wondering if it is due to that. I have seen three doctors and all of them say it is stress related. My insulin resistance test came back with a 4.3. I have had this condition for the past 20-30 days and it seems to be getting worse. I have exprienced some confusion and stumbling during the day. Can anyone help??????