When you say you persisted, is it a case of it gets worse before it gets better?
I tried using them as a way of desensing in difficult situations. Didn't work at all. But sounds like you're saying you use them in a place where you feel safe early in the day so you can get on with the day.
I once met someone who described their morning routine as, "I get up, go for a crap, and go and get breakfast etc". I was sooo envious that it was that simple for them.
Any side effects of using them? Can you keep using them indefinitely without problems? I read that they can cause irritation of the bowel, which may cause diarrhoea, wind or bowel pain and occasionally abdominal cramps.
I already get all those with the IBS.