Hey Cinder, happy new year
I had the eye twitch for months. It eventually in my case progressed into my cheek/nose area and then into my mouth/chin on the right side.
It can happen when you get overtired, if you're looking at a computer/TV too much (eye strain) or from stress. It can also be a legitimate (in my opinion) MS symptom.
When I had mine, I was limiting my PC time, I don't watch television, and I was sleeping 12-14hours a day. So I can't see how, other than MAYBE stress, it could have been anything but the MS.
It's really annoying I know! You may want to mention it to your neurologist.