Cat-
Hey that's great that you took a step outside of your comfort zone, but it sounds like you bit off a little more than you could chew. Next time, try what mother says and maybe take everything you need, except your coupons, or maybe your bottles. We all have to remember that it's very anxiety provoking to step outside our comfort zone, so when you do, you must take it a step at a time and not bite off more than you can chew. Try little things first, and once you gain confidence, try more until it becomes easy for you. And remember that setbacks don't mean that you failed at stretching outside your comfort zone, setbacks simply mean you might have taken on more than you could.
I'm very happy that despite your anxiety you stretched a little bit, so keep us all updated.