I have been experiencing dark green stool for 10 days now. After 7 days, I got sick (diarrhea and couldn't hold anything down). I was told to drink plenty of fluids and drink Gatorade for the electrolytes. After doing so, when I went to use the bathroom, my stool was brown. For the rest of that day, I was slowly eating to regain strength. I felt much better but was not drinking as much. The next morning, when I went again, it was back dark green again and every since. Is there something I eat or take to 'get back to normal'? Consuming a lot of electrolyte drinks along with a lot of water (I drank at least 2 gallons) isn't normal for me. What can I do...im lost for thought? Would this have anything to do with my headache and heartburn I am having?