Michael, is there any change in your regular routine? You really have weird lifestyle i.e. sleeping time & the diet. Headaches may be caused by a number of conditions, such as disorders of the neck, eyes, brain, jaw, teeth or even sinus infection. Medications, dehydration, or changing levels of hormones can also influence headaches. The exact cause of headaches cannot be ascertained immediately. There are several conditions that need to be looked into.
If it happens again please make an appointment with your physician, don’t just ignore it.