Pain in left hand & left leg

Cross check your report with 2nd doctor, i mean to say do all medical test once again with 2nd Doc.

there is pain but negative medical report , do take future risk and cross check your medical fitness report.

Internal body pain pain or joints pain also occurs due to cold climate ,
cold climate may include ,
bath with cold water,
Air conditioner,
or sleeping hard cold surface.

if yours medical reports are negative then you might be suffering from above mentioned causes or with some internal muscle pain.

You should consult with a good doctor, and look at your old report with another doctor. And for some time now you will have to stop falling under the A.C so that you are working Fan. Because you can give good advice to the doctor.