keep your old username. idk about the model in question but it's a joy for me to see an old reg name pop back up after not seeing them. your usernames are your faces, and its always nice to see a familiar face come through the revolving door of strangers.
but if you do change your username, be sure to tell her "im not sure if you remember me but this is _____, i changed my username." so she knows who she's talking to and saves you from the first time hustle song and dance. don't be offended if she forgets. even with all the notes, y'all can be forgotten or mistaken. there are times i forgot about a reg and several hours later after a camming shift it hits me like raven symone getting a permination.