Female, 40. right eye twitches a lot lately. what should i do? y is this?

Is it the eyelid?: Trembling of an eyelid, which happens in normal people, is called myokymia (an involuntary, spontaneous, quivering of a few muscle cell bundles within a muscle). Myokymia starts and stops spontaneously. In the eyelids, it can last a few minutes to a few days. One should see an ophthalmologist (md eye doctor) if such symptoms persist, keep recurring, or are combined with any other symptoms.

Muscle spasm: What you describe sounds like a common condition called orbicularis oculi myokymia. It's a type of spasm in muscles around the eye. It tends to present in times of stress. It can cause the vision in that eye to vibrate, as well. If symptoms are severe or not resolving over time, you should see an ophthalmologist.