I am physician who has been in practice for 20 years using my maiden name professionally. I am married, and use my husband's name socially, and when I was in medical school, I had my name changed legally to my birth/maiden name. As long as the reason for changing your name isn't to defraud anybody, it is ok to use any name you wish. Probably, I didn't even need to file in the court, but, I did. My son and his teachers and others have adapted well to the fact that I don't have the same last name as my husband and son. In this day and age, with so many blended families, I don't think any but the most conservative would give having a different name as one's spouse a second thought.
My reason for using my maiden name is complicated, but goes something like this. All of my licenses, degrees and training have been under my maiden name. It is very complicated in medicine to change your name on your credentials. If for some reason, I get a divorced, or is widowed, and remarry, I doubt that I would want to change my name on all my credentials. If I get divorced, I wouldn't want to use my husband's name professionally. If I got remarried, my new husband would probably not want me to use my ex's name. So, I just decided to use my own. (Keep in mind that the divorce rate is something like 50%, and nobody gets married planning to get divorced).
Since in your case, you already have a reputation established with your maiden name, you might consider keeping it professionally and have your nursing license in that name, as well.