I read that article as well! Funnily enough, I read it while I was in the middle of my fear of brain tumors and I didn't really freak out (despite the fact that I did get short, stabbing pains!) mostly because well... when I stopped to think about it, it didn't fit and there are so many more logical reasons than a BT =)
Headaches happen for various reasons, sometimes it does seem inconceivable but trust me you'll sleep better when you accept it. Like for instance today I woke up with a headache, because I went to bed too late (6am ... was a terrible idea) and than proceeded to force myself out of bed despite my body needing to rest more = boom headache.
If you get headaches daily, it could be a issue with your muscles, lack of sleep, or sometimes - the reason is simply unknown! My mother had a headache every day for a month straight, and than one day it suddenly went away. So headaches on their own usually don't mean anything :)