Wow, sounds almost exactly like what I went through. I initially thought that I, too, had Parkinson's. Long story short, I was dx with BFS. I still twitch, my hands still shake, but it hasn't progressed any. Check out aboutbfs.com. It'll be very helpful.
Google Benign Fasciculation Syndrome. You will feel much better after learning about this ailment. I have been twitching for 7 years annd scared myself sick over ALS, MS. etc..