I recently started getting bad headaches, could this be something serious?!

I recently started getting bad headaches, could this be something serious?

I have ruled out teeth and eye problems, and other things like the weather and so forth

If you feel you have ruled out teeth, eye and weather I would suggest seeing your doctor. Tension in the neck is a very common trigger. Are the muscles in your neck tight? How about your shoulders. Although you have ruled out weather, the pollen counts are higher than ever - even those without allergies are having side effects. Have you changed your diet recently? Since you feel the obvious isn't causing them it's probably best to see your doctor.