I work in a gynocology office in an older building where the lighting isn't the best. Since I have started working there, I get headaches after lunch time. Doesn't seem to be connected to any particular food, or if lunch is at noon or 3. I wondered if it was just the lighting? or if maybe something else could be going on. I am a healthy woman not taking any medications or suppliments. Any thoughts on even if I should be concerned?