OMG I have those kinds of worries all the time. Mostly about being stuck someplace and have my stomach act up on me even though I know chances are that's not going to happen because most of the time I feel pretty damn good. But for me it's embarressing and humiliating sometimes to be the one who has to "run to the bathroom" or to be the one that stinks it up in a public place! I've gotten sooooo much better about dealing with the anxiety and have found ways to calm myself down and to have more rational thinking and I avoid panic attacks that way. And then I say to myself I did it - I survived a long car ride, or a dinner far away from home or a long meeting at work. Meaning I survived without panicking about it.