I was wired shut after my first surgery (no splint) and banded with a splint after the second. You'll have times that you feel like you can't breathe, especially if you had upper jaw surgery and you're all stuffed up, but you're getting air in. I feel like more times than not, it starts to get more like a panic attack than anything else. Just try to stay calm and not think about it. I had a rough go of it for my revision because I was a LOT more swollen and I also came down with a chest cold the night before surgery, so I was super congested and would have had a hard time breathing anyway without the jaw work on top of it. I definitely had some rough moments the first 3 days. I sat in lots of hot showers and put my face with towels covering me over a bowl of water to allow steam to open up my nose. Your surgeon will probably give you something like affrin, but try not to use it constantly as it will eventually have a rebound effect and make you stuffy instead of clearing you up.