Sounds like a panic attack to me. Early on, smoking would bring on some of the same feelings of a panic attack, and bring my awfully close to having one. They suck, but if you try hard enough, you can learn to avoid/fight them. First panic attack I had was caused from a bicycle accident. Popped a wheelie, fell with the wheel turned, landed on elbow. Very little blood, but my sister saw me fall very hard, and asked if I was alright inside the house. I said Yeah.....and the end of yeah was me getting very dizzy, and spinning half way around, collapsing against a door. Blood, and extreme pain bring me panic attacks, but I've learned to fight 99% of them off. My panic attacks involve a static, or light whistling/ringing in the ears, perhaps claustrophobic type feelings, vertigo, poor circulation to the upper body. I had one in front of family, and I looked like a corpse due to the blood being mostly absent from my head. Sorry for going on so long.