Frequently (once or twice in some days) I feel the blood rushing to my head. During this event a get dizzy, hear ringing in my ears, and feel like I will faint. I fainted only once, 4 years ago. This usually happens in the mornings and the patterns is unclear. Most times it happens while working on the computer with little prior physical exertion. I have taken my BP after such spells and it is normal . I am overweight and I do take medication for high BP. I am almost convinced that these symptoms have more to do with GERD or diet, than with the heart.I do not have diabetes. Any advice? Thanks