Problem of foul smelling flatulence.

For three years I have been suffering from foul-smelling flatulence. My SIBO is negative, H.pylori negative(had it last year but now negative), and Endoscopy is normal. Bowel movements 5-6 times a week. I tried to find food triggers but was not able to find them. Any food can cause it. Not allergic to dairy and gluten. Stopped these for 15 days but the smell still persisted. My stomach makes a lot of noise during the night sometimes. Sometimes I also go through acid reflux issues - nausea or a few times foamy burps. Took antacids tabs, GERD tabs and syrups but not working. The problem is not gas, its the smell. Should I ask my doctor for any other test? Is there any medicine that can help eliminate the smell of gas?