I take Lomotil daily but I only take one and I'm great for the rest of the day, I couldn't imagine taking 3 or even 5 at a time. Have you tried just taking one and definately start taking probiotics they do help but culturelle doesn't have as much bacteria as the Renew Life Ultimate Flora Critical Care(50 billion live bacteria per dose) it is highly used on the UC forum. Probiotics definately help for diahrea but you need to get enough good bacteria into your colon to replenish what is lost.
You should also add metamucil to your day, take it at bedtime just in case it causes gas. It helps ti absorb water in the colon and bulk the stool.