Hi Dr. Rynne, I m 55 and experienced dizziness a little on Wednesday but a lot yesterday and some today. It happens when I lay down (room spins for about a minute?), when I sit up, and when I stand up. I am overweight, and have been having pain in left knee from osteoarthritis and also in my left leg all week. Normal bp is 110 over 70, last time at dr, 130/80-90. a whole lot of stress at work.