What Causes Trembling Of Hands And Leg?

I am 53 years old and in good health, physically and mentally active. Over the last six weeks I ve notices shaking in my hands and sometimes my leg. I also have some minor jaw, shoulder, and hip pain on the left side. I know, I know, you re thinking stroke, but I think it may be sciatica. I m mainly worried about the shaking. I take enalapril, 10 mg, pristiq, 50 mg, a calcium/vitamin d supplement (started around the time I noticed the shaking) and I split a 100 mg pill of wellbutrin, the regular, not the extended release.