Hi. The last two mornings I wake up and feel dizzy. When I stand to walk I drift to the right. It is not vertigo, it is lightheadedness. It takes a few hours to go away. When I turn my head right to left I can feel it linger. Have not checked orthostatic b/p yet, however, it seems to last too long after remaining upright to be a b/p problem. Started a Z pack yesterday at 3:00 p.m. No real sinus infection symptoms. I do have COPD. Any ideas?