This sounds very fa.miliar. I am offering my own experiences as info, not a solution.
I was offered two suggestions ; keep a journal and spread your eating over the day, not just three meals.
I started by eliminating animal fats, i.e., butter, youghurt, Ice cream, beef, pork, etc. I cut out chocolate, coffee, both regular and deaf,
I spread out my meds through the day rather than all in the morning. My diet was low fat everything, even some vegan dishes. After one of two days my b/m's came down to one per day. I then started to add some of the foods I had eliminated. I discovered that my digestive system reacted in two different ways. Sometimes the diarrhea started in two hours or less. Sometimes not until the next day depending on the food.
I started to make a list of the foods that affected my the most , like chocolate and yoghurt. The list is getting longer but I seem to me making progress. Basically it is a low fat diet. I know that chocolate and whole milk products are out. I will be addu things, one at a time, to see how they affect me.
It is going to take awhile but I won't give up.