What kind of headache? tension, migraine, etc.? Where does it hurt? is it a clamping feeling or a throbbing headache? In order to diagnose the cause of why you keep getting headaches, the type of headache and where and how it hurts helps a lot. If you're taking aspirin for headaches, it could be "rebound" headaches. Stress and worry can cause headaches, as well as your posture and sleeping position. There are too many reasons why you could be getting these headaches. Headaches can be anywhere from easily treatable to something very serious like a brain tumor or swollen blood vessels in your head.
In any case, I pray that the Lord will heal you of your recurring headaches. As for now....relax and get some rest. :)