It could be an episode of Multiple Sclerosis, which causes demyelination. It can be difficult to diagnose and many patients were only diagnosed after seeing a specialist is MS.

I take low dose artane, and it does help me... with dystonia, intention tremor, and my gait.

A general neurologist may be your best bet at this stage, and if the neuro does not try to rule out (or in) MS with various tests, I'd see an MS specialist.

MS episodes can come on VERY suddenly and be very disabling. The patient may eventually recover, or remain disabled. Every one is unique.

~Zucchini