In my opinion, a nurse needs to be very thorough in all things. After all, you are dealing with the lives of other's and if you don't read that medication bottle or read the doctors orders thoroughly, you just may miss something that could cause harm to your patient. My point is, I find it difficult to believe that you didn't read the application you were submitting for your nursing license.
I too had to submit a declaratory order to the TX BON. I read each line, line by line very closely; it clearly states (I'm paraphrasing here) if you've ever been "arrested (except for minor traffic violations)" then you must submit the paper work, and a letter explaining the circumstances of the arrest, etc. The same thing you're having to do now.
I'd be a little worried if I were you. They (the nursing board) are going to think you lied and tried to pull one over on them. On the other hand, they may say, wow, doesn't this nurse know how to read. I know it was a very minor offense, but still. That is something you should have caught. If you read the BON application even further, it will most likely say to list expunge offenses, I know the TX BON does.
I'm sorry for you situation, but you need to learn from this.
Before I even applied for nursing school
, I went through this process because it was the smart thing to do.