How Can Excessive Burping And Chronic Diarrhea Be Treated?

I have been having some stomach problems. I experience burps that taste and smell like sulfur, my stomach feels upset, and I ve had occasional bouts of diahrrea, intermittent with slight constipation. It lasts maybe 1-2 days typically. It goes away for a few weeks, but seems to return lately. I was diagnosed and treated for H Pylori several years back, and it seemed to go away. This feels similar. Thanks.