i know that you are not supposed to use afrin nasal spray for more than three days in a row, because it causes serious rebound congestion. however, i have been using it for about two or so months just about everyday. i have been using it as directed (2-3 sprays in each nostril every 12 hours). sometime when i use it (like just a few minutes ago) i get really dizzy and feel tired about 10 minutes after using it. is that a side affect of this nasal spray? if so, is it common or should i be concerned? also, my upper jaw by my cheeks feel a little tight and weird. any suggestions?