I then waited another few weeks, until yesterday, when I went to see a gastroenterologist. He said the
Doxycycline could very well be to blame
for my bloating and belching, and that he wanted to perform an endoscopy. I had the scope, during which he examined my esophagus, stomach, and duodenum (initial part of intestines). After the procedure, he said everything inside me looks normal and healthy, and that the only thing it could be is IBS or dyspepsia.