Burping that smells/tastes like eggs is no fun. I have had that a few times as well. I'm not sure of the cause, but it often accompanies being ill. It will probably go away on its own, if it hasn't already, but Pepto Bismol helps a lot. Hope you feel better!
it could b bacterisa in the mouth. thats what appened to me. get some goodmouth was, and brush your tounge as well as your teeth