Hormonal Headaches and Menstrual Migraines

Over the past few months I am starting to experience a particular type of headache on the second day of my period. I don't get these types of headaches at any other time during the month...it is a sharp pain in the front of my head that like clockwork occurs on Day 2. Prior to these headaches starting, I was experiencing a different type of headache approximately 48 hours prior to my period starting...that type of headache was not painful, it was more like a weird fatigue-like dull feeling in my head and the back of my neck...very hard to explain...but my head would feel "cloudy" and tired and weird. I don't seem to be getting those anymore now that I am getting what I think are menstrual migraines on Day 2. I wish I knew why these headaches come on and more importantly, how to prevent them.