Ever since I was in 2nd grade, I'm in 12th grade now, I've had occasional sharp stabbing pains in my left temple. I've heard this could be caused by vision probems, my left eye sees blury, or changes in weather. I also heard it could just be a certain type of headache. Usually I don't get the pains often but lately I get them freuently. What to do?? What could it be??