Honestly, if you feel like you are obsessing about your IBS more than you'd like (and I think we all obsess a bit, particularly when starting the diet), why don't you try hypnotherapy? It really did help me integrate my IBS into my life rather than ignoring/fighting it. While you may not want your IBS, all the stress that goes with fighting it only makes it worse.
Let me give you an example. When I used to feel an attack coming on, I would tense up and become hypervigilant. While this did make me diligent about drinking tea and eating SF, it never stopped an attack. Plus, it was a really miserable way to live.
One day after doing the IBS 100 hypno, I was getting that pre-attack feeling. Instead of tensing up and dreading that attack, I instead consciously relaxed and told myself that I have contingency plans if the attack comes and that I'll feel better pretty quickly. 15 minutes later, I felt perfectly fine, which never happened with the old tense-up routine.
It took me a couple of years after discovering Heather's diet to actually get the darn hypno CDs, but I should have done it earlier. It's a great way to move IBS from being the center of your life to something a little more proportional and livable.