My first experience with health anxiety was when I was 13. I was on a family vacation and one day at dinner I just got really dizzy. My parents told me to put my head between my knees and I"d feel better. I didn't . I was dizzy for the next 8 days straight. Looking back, I just had no idea what was going on and we are on an island in the middle of no where so I'm sure I was just anxious and, as other's have said, full of adrenaline. I made it though. I've experienced this a few times since then. Always scary, but try to remember that I've always been ok.