I have had diarrhea for the last 3 1/2 weeks, I am currently on medication that is suppose to stop this, one of your doctors prescribed it for me 3 years ago (or close to that time) it has quit working this all together, I have pain across my abdominal from time to time also, I will be coming Feb. 16th, but I can get to from the toilet to make the 3 hr trip to the clinic, is there something over the counter I can take to slow the diarrhea down??