I've been getting frequent heartburn symptoms added with fatigue and loss of appetite, in addition to loose stools for the past 5 days, any ideas? thx

Heartburn: The combination of heartburn and loose stools may be due to gastroenteritis which could be viral. Black stools would suggest bleeding from the stomach lining and could explain fatigue. Follow a bland light diet,avoid alcohol,caffeine and nicotine. Prilosec relieves heartburn and kaopectate (kaolin and pectin) reduces diarrhea.See your physician if symptoms don't improve.

I recommend ...: Acid reflux with associated infection with a bacteria called Helicobacter pylori can cause these symptoms. I recommend seeing your doctor for evaluation for this