I've been having watery stools that smell like burnt hair and it looks like it has black grit/flecks in it. I also keep having waves of blurry vision. I take several supplements such as iron, evening primrose oil, plant enzymes (I have no gallbladder), and magnesium. I've had many days of this over the past month, but it's not constant. I'm also experiencing waves of lethargy. Any ideas?