Horrible throbbing headaches.. but only when I bend down?

When I get a sinus headache or a sinus infection, it hurts like a *@#!#! when I bend down or even lay down. Or maybe you are sensitive to Excedrin, and now that the migraine is gone you're experiencing a headache brought on by the medication you're taking. I get horrible headaches from Tylenol and especially Tylenol 3, and my problem with that stuff didn't start until I had my daughter. Before I had her I could take it.