Since you have days when there is no shaking and days when there is, try keeping a diary for a few months and write down whether you were worried about anything or whether you were very tired or whether you felt good. After a few months have passed, compare your notes.
I have had hand tremors (shaking) since 1999. My left hand shakes more then my right. I still have the tremors, but they shake alot less then they did. I was diagnosed with CIDP in 1998 and my legs were like noodles for about four years. They are ALOT steadier now.