Also, citizenship is a big deal to a lot of people, and when things matter to us we sometimes may get anxious that something could happen to it.
To me, it's virtually impossible to not worry about some things. With this application I checked, double checked, triple checked, marked on a sheet how many times I checked each item in the checklist. Closed the envelope. Opened, checked twice more. Closed. Got afraid that I might've forgotten something, opened again. At FedEx they made me remove my envelope to use theirs, and because of that I got even more anxious later, afraid that something could've dropped. Came home, checked this board, saw bad advice (that some documents were a must, when they aren't), worried more (but this one faded soon enough)... On a rational level, I know that I filled everything correctly and included all necessary documentation. Emotions and rational thought don't necessarily go together, though.