I think i have mild lid lag (left eye) or droopy eyelid (right eye). it came out of nowhere and doctor checked for signs of stroke etc and i had none. other symptoms are mild headache in the left eye area that i believe has lid lag?

You have to have both workups: 1. If considering your left eye as abnormal the most common cause is Thyroid disease. Your primary care doctor can do the tests. 2. Considering right eye is now droopy, most common sudden causes other than trauma could be a migraine like attack. You should see a neuro-ophthalmologist who can do an OCT of your eyes to see if there is any brain lesions & then MRI.