During the past few weeks, when I get up, my head reels. I checked my bp . It is around 165 / 90, but it has been 150 for many years and the doctors have said it is OK for me. I am 68 years old. Otherwise, my health is normal and i am an active person and a teacher at the local University. My glucose level is a bit high recently, around 160. What could be the reasons.