I started getting abdominal pain and heart burn symptoms 4months back which reduced with PPI and a few antibiotics and I continued taking ppi whenever I felt discomfort. But since a week my symptoms of heart burn are at a peak, I have abdominal pain, excessive flautance, black stools, frequent hunger, pain reduces if I immediately eat food, mild fever, letharginess, burning sensation in my stomach and chest, this sometimes radiates to my lower back and nausea. Can you please tell me what the problem could be?