last night i awoke not being able to breathe, i was sleeping on my stomach and sat up gasping for air. when i sat up i inhaled vomit. i could not get the vomit out of my nose or mouth to get a breathe of air. i never woke up while vomiting, i did not feel sick or nauseated. i was very scared and honestly i felt i was near death not being able to breathe. what happened??????????