It isn't that you are stupid or crazy.The problem is the anxiety triggers certain kinds of thoughts that then feed the anxiety that then trigger more thoughts and if you happen to have a bit more of that part of the brain/nerves that do that and fewer of the ones that settle that down you are more likely to get stuck in the loop.Think back to when we spent all day outside."What was that noise"Look around and see a lion crouched in pounce mode"AAAAAAAAAAAAAAAAAAAAA" massive rush of adrenaline that gets you to safetyThat is a good thing.The problem is when you still go into "AAAAAAAAAAA" mode whether there is a lion or not, or you can't calm it down once you've escaped that can generate unwanted anxiety.You need a bit of that cycle to keep you safe, but some people get a bit too much or not enough calm it back down and it is just how your brain is wired. It isn't something you did, or something you should just know how to control.However it is sometimes something that does seem to want to keep they cycle going (almost like a craving) and so it can take some time, effort and often medication to break the vicious cycle so you can get back to the "no lion, nothing to fear here" state.Unfortunately with IBS they symptoms of the disease are ones that tend to make anyone a bit anxious. I mean you don't see many really calm people with food poisoning when they need the bathroom NOW! The problem is once the anxiety kicks in it ramps up the symptoms which then ramp up the anxiety. It took awhile for everything to get this ramped up, so it can take awhile to get everything ramped back down. Be gentle with and kind to yourself while you are healing this issue. Beating yourself up about it won't help.