@vvxjr9, I too deal with ongoing diarrhea. I was diagnosed with irritable bowel syndrome (IBS) after the gastroenterologist tested me for Crohn's, SIBO, colitis and celiac, which were all negative. Initially I had only chronic constipation, but have since developed chronic diarrhea and control it with Imodium tablets and eating more starch. Eating smaller amounts at one sitting helps me prevent incontinence. It's a temporary fix and there is little else I can do.
You might already know that multiple sclerosis can cause a digestive disorder called gastroparesis, where the stomach can't properly empty itself. Perhaps your doctor performed that test as well?
Finding ways to manage diarrhea can take time and involve a bit of trial and error. It's something that keeps me home and a bit nervous to venture out in case I have a bathroom emergency.
Thanks for sharing your problem with us, it affects so many people! Best, Kim, moderator