Sorry to hear that you are still having symptoms.
I hope that you have seen a digestive disease specialist before
you were diagnosed with IBS. Have you been tested for Lactose
Intolerance (Dairy products such as milk and cheese). Also have
you been tested for Celiac disease
present in Wheat,Barley and Rye products).
You can add bulking agents such as metamucil
or similar supplements
to add fiber to improve the consistency of the stool.
Also over the counter medications like Loperamide
will help control