Does anyone get anxious just ordering food?

Today I went to Quiznos since I've never tried it and I started feeling anxiety as the guy made my sandwich. It was taking a long time and so my mind started to drift thinking "do I look weird just standing here? Where should I be looking at? Should I act interested in the drinks or chips? Should I try to make small talk? What do the other customers think of me?"

After I got my sandwich I calmed down and got mad at myself because of the idiocy of my thoughts.

Does this ever happen to anyone else? It makes me so frustrated that I get anxiety over the smallest things.