I've been having a headache in the back right of my head for a few days now, it started hurting Monday, and since, it's been on and off. It's not enough pain to stop what I'm doing, but it's just annoying me. It's in the back right of my head. I think it's because I chew tons of gum, and I've heard chewing gum can make headaches occur. I stopped for like 2 days, and I was for the most part, pain free for the day, until I started chewing again. But, I'm really scared of this. My cat has fleas, could it be likly that a flea got in my head and is eating it's way through my brain?