Emily, there are a number of reasons one can obtain a headache. I myself have had them for over 40 years. In fact, 8 years ago yesaterday, I ended up having a brain anuersym. Not to friighten you, but if these persist, I would most certainly go and have this checked out. Could befrom stress, not eating correctly, dehydration, a number of things. I have migraines, and this is not a day at the beach! Hope you find relief!