Symptoms currently include: stomach ache, nausea, burping (ranges between vomit & air that comes up), sinus which i don't think is related?

Aerophagia: Aerophagia is a term used for excessive and repetitive air swallowing, People may gulp so much air it produces uncomfortable GI symptoms It includes, bloating,belching burping and flatulence, abdominal dissension , audible air gulping. We pass air through our anus 13 to 21 times/day, the frequency increases with aerophagia How we drink, eat, breathe play key roles. Sinuses are contribu

Suspect reflux: This may be a reflux. You can see a gastroenterologist who could help clarify your symptoms and make the correct diagnosis.