Your symptoms mainly pertain to the left side of the body (left leg and left hand) . You have got very elaborate tests done which are normal. Apparently it is only a sensory problem because you have not mentioned anything about the weakness in the affected parts.
With normal reports I think you should have
Vitamin supplements especially B1, B6 and
B12 and Vitamin D3.
You should also do active movements of the upper limbs, all movements at the wrist joints and the small joints of the hands. Movements of the hip and knee joints in the lying position.
That may help you.