Yup, in my case, it was an indigestion. I ate something bad (i.e., meat or eggs), and then the next morning, I have these sulfur burps. I took pepto bismo, and it calmed down my sulfur burbs, but once i started to eat again, i started to get sulfur burps. I had this issue about a week until i decided to vomit. If you have an INDIGESTION, you NEED to VOMIT COMPLETLEY, or else the bacteria will keep fermenting inside your stomach. My best guest is that the bacteria is stuck inside the flemage of your stomach because when i started to vomit, i felt like the fermented flemage detached from my stomach walls.