I don't usually have headaches. if i do they are gone in a day. for the past week i've had them off and on for about a week. ?

I wouldn't worry: too much. If you never got headaches it might be a little more concerning, but the fact that they come and go is reassuring. It most likely represents some lifestyle change like more stress or lack of sleep. I would be more concerned if the usual location had changed or the intensity has increased/is increasing. Using your usual OTC pain killer will probably be fine. See your Doctor if persists:)