Symptoms Are: Burping, Bloat/general Feeling Of Very Full, Diarrhea (black),

symptoms are: burping, bloat/general feeling of very full, diarrhea (black), stomach churning, slight nausea...these symptoms on and off for several months but now very uncomfortable. Had a abdomen ultrasound and it was good....looking to see doctor to get referal to someone who can solve this for me