Hello, for a few months I experienced diarrhea after eating. Didn't matter what food, but 95% of the time after eating I had to run to the bathroom. I started taking probiotics about 5-7days ago to help. The past couple trips to the bathroom the diarrhea has completely stopped, but now my stool is a darker color. Should I be concerned? I'm not experiencing stomach pain, excessive gas, or any nausea.