Why is it different v* from alcohol compared to a sv?


I havent v* from alcohol (touch wood) but very nearly did this summer after drinking alcohol and choking, it went down the wrong way n i started to choke and cough and then i heaved bout 3 times, it was so scary i thought i was going to v* but thankfully i didnt, i caught my breath back and was ok then after about an hour of walking around trying to calm down, then i laughed to myself bcos the noises of heaving i was makin were so embarrassing im just glad no one was around to listen (it was like 4 am in Spain around the pool on my own bcos everyone was wasted and went to bed). My stomach hurt and nose felt like it was burning, n it reminded exactly what it was like to v* cos ive not for (touch wood) a long time- when i was 9 and now im 22 and it scared me just to heave. i dont class it as v* tho, i once heaved from a migrane, i dont like it cos u just cant catch ur breath.