A few months ago, I started getting headaches, but after a few weeks they mysteriously stopped. I went to the doctors (when I had the headaches), but they found nothing. Now, after a few months, I am starting to get them again. It seems to start all of sudden...I was at Walmart, and I felt like mild pop in the middle of my forehead. Now a days, I get them everyday, and they seem to start in the early evening, and don't seem to be as bad if I am wearing glasses instead of contacts (I had my eyes checked when I last getting headaches). I have no other symptoms (no dizziness, blurred visions, nausea). Should I be worried? What should I do?