For about a year, when i drink a cold coke or carbonated drink i would get a bad pain in my middle chest, get really dizzy and feel faint, but never passed out. I would just wait a few seconds and it would go away. Yesterday, I took a big swig of coke and I got a sharp pain, leaned over the counter until it stopped and the next thing i knew I woke up on the kitchen floor. I had actually passed out this time. What kind of a doctor would i need to go to about this?