What can I do about 2 weeks of my eyelid twitching?

Myokymia. Random twitching 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. It can be caused by stress, dry eyes, caffeine, lack of sleep. Reduce intake of alcohol/tobacco/caffeine, get rest, reduce stress.
Eye irritation. The eyelid is likely twitching due to eye irritation from some cause (like dry eye , blepharitis, etc). Try using frequent artificial tears, ointment at night, and warm compresses.