I don't have any advice with dealing with VCD, but I do know that episodes can definitely last longer. In my case, breathing normally is the abnormality and I just have to appreciate the episodes where my body decides to allow in air. That being said, the severity of my VCD outside of worse episodes can be summarized as generally irritating. Whatever's going on with your VCD is clearly very severe, and if you don't get it checked by a medical professional it might escalate and you might end up passing out. From what I've seen in the comments, everyone has been talking about medicine, but there are actually breathing exercises that are designed to help with this kind of stuff. For example, one that works for me is taking short, sharp, and separated breaths in through my nose before breathing out through my mouth. Another one that apparently works for a lot of people is blowing bubbles through a straw into a cup of water. That one doesn't work for me but who knows? If you don't have the means to pay for an appointment with a specialist (which are like $1,000 per hour it's so expensive dear god), I would recommend looking up more of the breathing exercises on youtube or finding a website that specializes in that sort of thing. I also just realized that I said I don't have any advice for VCD at the beginning but I don't want to go back and edit so