Well I'm not a doctor but my mum she doesn't eat ANY salt and she frequently gets cramps in her toes and fingers maybe your salt intake is to low? I wouldn't no though sorry!
if any of this happens:
Sudden numbness or weakness of the face, arm or leg, especially on one side of the body
Sudden confusion, trouble speaking or understanding
Sudden trouble seeing in one or both eyes
Sudden trouble walking, dizziness, loss of balance or coordination
you should go to the doctors immediately.
It could be a number of things... but most likley a neurologist would be able to handle it for you. . can you still feel hot and cold? if you can that is a good sign.
You should consult a neurologist..