UserX
When I first developed these problems it was very very bad. When I would stand up I almost felt like I was going to pass out. My heart rate would be elevated for probably 10 minutes after standing up.
Also my heart rate would rise when I would lay down and stay that way. It was hard to sleep at times.
For some reason now this has resolved. Not sure why. My blood pressure is perfect all the time and I never get dizzy at all.