I have pain in my right eye & goes to my temple. what could this be?

Go see your DR: Right away or go to the er especially if there's visual blurring or blindness. It could be a sign of inflammation of blood vessel in your temple and in the (optic)nerve in your eye.

Possibly iritis : Characteristically intraocular inflammation radiates to the brow & temple. Particularly of your eye is red and sensitive to light, i'd expect iritis. Schedule an appointment asap to have an eye md evaluate your eyes. Treatment is necessary for this to protect your eye.