Listen, calm down. You anxiety isn't helping you at all. I have had pencil stools, black stools, green stool, pale stools, constipation, diarrhea, sandy stools, etc , and I am still alive. People with gut dysbiosis , candida, bacterial overgrowth, etc, can have all that without any other serious complication. Whatever you have, it will come to the light soon or later. Think positive. You and your Drs will find the problem.
Jorge.