My husband is having the same problem. He had Nissen Fundopulation surgery 2 weeks ago and is constantly belching and is nauseated. He especially belches during the night and often throws up with the belching. I'm a little worried because everything that I have read about this procedure says that patients have trouble belching post op. My husband is using chewable Gas X & has started taking reglan to help his stomach empty. He is scheduled for a nuclear scan tomorrow to make sure there are no problems.