Eye twitch

Does anyone have a trick for getting rid of an eye twitch? It's near constant, so many times an hour I lose count and each session goes for at least a minute or two.
I've tried valium thinking maybe it was stress or anxiety related because I'm under a lot of stress and that hasn't helped it.
My caffeine intake was 2 cans of Diet Coke a day and is now 1 can a day.
I get plenty of sleep.
I do work with computer screens all day but it's never been an issue before.
I'm literally going insane! If anyone has any tips or tricks or thoughts I haven't come up with yet please help me!