Homeschool Headaches.

I've realized that almost every morning I get a headache. I wonder if you can get a headache just from doing too many things at once. Sometimes I'm saying "I don't know why that is" to my older son and to my daughter I'm spelling something and to my younger son, who is really interested in adding up numbers now and I'll end up saying sentences like "I don't know, B-E-C, yes 16 + 16 is 32, A-U-, really? 32, S-E." Could this be causing my headaches????