I too have had constant belching for 1 year. Dr. said I was swallowing air. I disagreed with her and insisted on a test for H pylori, Blood test was positive, took triple therapy, had breath test after and that was negative. H pylori all gone.
Welcome to the gastroenterology community! H Pylori is very very common; over 50% of the world's population are positive for H Pylori. I hope your symptoms improve soon.