I'm pretty sure mine is caused from allergies...ugh, I hate headaches...have to find my favorite decongestant, which was all out at the one grocery store I stopped at...
I do feel a lot better now that the humidity level is down a lot today. I did have to lie down after taking MIL shopping tho...the stress of having her cry so much takes it's toll on my nerves and I get fatigued afterwards...