Hey Kerri, I experience related issues like dizzy while driving not really dizzy but you know when you go on a roller roaster around a tight turn that kind of feeling stomach and dizzy abit feels like that. i remember i got really dizzy onetime but i think it was from being hungover lol. It started about 1.5 yr after after my valve repair been on warfarin since. Or sometimes going down hill fast i get dizzy sometimes. I never really asked my doctor if i had to geuss it might be the warfarin dont know but i thought i was the only expiercing that..