It sounds like you became dissociated in the situation. Have you heard of it? If not google it, it's very common with social anxiety. Parking your car a zillion times seems like OCD, but that's a different thing.
Maybe you expected to feel differently about your experience at the bakery and when it was neither pleasant or gratifying as an accomplishment nor uncomfortable, it felt like it went "wrong". Or maybe the wrong part on the bus was because it didn't go wrong and that started to make you feel nervous? Maybe you're worried that there isn't anything wrong with you, I mean you handled it like anyone else would without needing Xanax. I'd do it again, because now you know you can, this time you don't have to think about it!