I keep burping up egg smell and have gas as well. have not ate eggs lately. any idea?

Sulfur Gases: The terrible smell of sulfur burps is caused by hydrogen sulfide (h2s). The gas is known to originate from certain foods that contain sulfur proteins in them. During the process of digestion these proteins are broken down in the gastro-intestinal tract by sulfur-reducing microbes. Try altering your diet, and if persists, then seek medical evaluation as some infections can also cause it to happen.