birth control
"I don't think I noticed this at first or even realized the pill was the cause, but this pill gave me terrible headaches for 3-4 days during my period.  I am hungry and moody before my period. The period is very light, which is a plus, but I can't stand the headaches.  It feels like I have a sinus infection and taking Advil non stop doesn't help.  It's not worth it.  I would LOVE to have cramps instead of headaches."