You can have sinus trouble without anymore symptoms than the sinus pressure. Migranes don't cause sinus pressure. Being really tired or weather systems cause mine--like the one I currently have. With a migrane you may or may not have an actual headache either. I get the auras, sensitivity to light and noise, sick to my stomach, etc. The whole works. Sleep helps but, I also have strange and unsettling dreams so it's not always restful.
