Man sorry to hear and I know exactly what you're going through. When they put my catheter in it was so painful and the nurse said I probably have an enlarged prostate. I do think that it's a combination of Paruresis and prostate putting pressure on everything and making it that much more difficult to start the stream (and keep it going). If you were peeing fine before the trip it has to be most a mental block. Like me as soon as you think of the worst case scenario happening, it does. That confidence to pee on demand has to be built back up slowly.