What does it mean if your hands are shaking a lot? (help!)

My left hand is going absolutely insane and i’m really scared of why… when i rest it on the keyboard it makes all the keys jutter around and stuff, but my right ones seems fairly ok…
(as i do) i am getting kinda petrified, as i’m scared i have some neurological disease or something…
Are there any meds that make this happen? In case it’s that… please help =\
Or it could just be anxiety…
anyway google is talking about western greetings which doesn’t really help…