My daughter vomits when she has a panic attack. She was at the doctor's cos she has been vomiting so much and they were trying to get just enough blood for a white count. The tech pricked her finger and it clotted too fast so she told dd that she would need to prick another finger. My daughter panicked and started vomiting. She totally emptied her stomach. she seemed calmer afterwards but still up tight and a bit woozy from the violence of the vomiting.