You might want to get your gallbladder function checked out, even though you are feeling better.
Hi
Welcome to the MedHelp forum!
There are some bacteria in the gut that produce hydrogen sulfide gas. Sometimes this gas is produced in such huge quantities that the sulfide oxidase enzyme in the wall of the gut is not able to oxidize all of it and convert it to thiosulfate. This gives sulphuric acid burps. Most of this gas comes from sulfites a person consumes, which is a part of all preservatives. Sulfites are present in all juices, molasses, yellow dye in ready made food stuffs, and red wine. Sulfites are present in lesser amounts in mashed potatoes made from dry powder, pickles, tinned shrimp, cookies, crackers, and readymade pie dough.
If you have been taking these things in a good amount, then cut down the intake. Also take a lactobacillus preparation and yoghurt with your meals. In all probability the smell will go. If it persists, then talk to your doctor.
Hope this helps. It is difficult to comment beyond this at this stage. Please let me know if there is any thing else and do keep me posted. Take care!