Hi Gabrielle,
I started feeling faint/dizzy during my practice before I had the diagnosis. It was part of the reason I sought the advice of my doctor. It happens ususally 45 minutes into the class, and after doing poses like downward dog, or anything that requires going from a sitting/laying down position to a standing one. My blood pressure I take weekly, is usually within the range of 110/70. At first I thought it was the heat causing the problem, but Ive noticed an intolerance to any sort of cardiovascular exercise as well.
Any advice you can offer would be great!