i think the belching may in fact be connected with your sinuses. my adenoids and tonsils are enlarged and sometimes hinder airflow. because i do have sinus problems...enlarged tonsils, postnasal drip, headaches, stuffy ears, popping nose...the belching intensifies my sinus problems. what i am thinking is, when i sleep, my air intake in limited. i have suggested this to my doctor who is going to do a sleep apnea test. this causes sinus problems i think. when i first awake, it is the worst, which leads me to believe that it is connected to my sleep. as far as the belching. my opinion is that when the air is expelled, sinse my air tract is already limited in size due to the enlarged tonsils, it causes pressure and discomfort. i have felt lightheaded a couple of times, which in turn causes me to panic. the gas that was originally on its way to being expelled somehow then seems to get stuck in my throat...sometimes for like an hour and scares me. only when i calm down and finally do belch, some pressure is releived. i do not know how serious sinus problems are, but i experience some very complicated symptoms...the pressure never leaves and is causing me to feel somewhat fuzzy feeling more often than now now. just a little advice...