Anybody ever gone swimming and accidentally sucked water into their nose?? That terrible burning you feel that makes you sneeze and takes forever to go away. Well today I vomited and sneezed at the same time and had that happen with what felt like pure stomach acid. I can truly say I've never felt pain that bad. And I've been through childbirth without drugs. My sinus cavities are on fire and I now have a headache from hell. How on earth does this crap happen?!!