I'm sorry to hear about the digestive issues you're experiencing. Sticky, clay-like stools with oiliness, along with flatulence and acidity, suggest that your body might not be properly absorbing fats. This condition is known as steatorrhea, which can occur due to problems with the pancreas, bile production, or intestinal absorption.

Given your history of heart disease and the symptoms described, here are some points to consider:

• Pancreatic insufficiency: The pancreas produces enzymes necessary for fat digestion. If these enzymes are insufficient, fats remain undigested and appear oily in stools.
• Bile salt deficiency: Bile from the liver helps emulsify fats. Any disruption in bile flow can cause fat malabsorption.
• Other causes: Conditions like celiac disease, chronic pancreatitis, or small intestinal bacterial overgrowth could also cause similar symptoms.

Since you do not have abdominal pain or fever, acute infections are less likely, but the symptoms warrant thorough evaluation.

Recommendations:

• Consult a gastroenterologist for detailed assessment.
• They may suggest stool tests for fat content, blood tests for pancreatic function, and imaging studies.
• Avoid oily and fatty foods temporarily to reduce symptoms.
• Keep a symptom diary to track any changes or triggers.

Early evaluation and management can help improve digestion and prevent nutritional deficiencies. Please seek specialist care promptly to identify the underlying cause and receive appropriate treatment.To narrow down potential causes, we will need some more information.Please tell me your age and gender.