I sent a girl a picture and she said goodnight

I've been talking to this girl a lot on text (we've hooked up just a few days ago, it was great), and while we were texting she asked me to "send a pic". Having never sent a nude or anything before, I told her I'd never sent something like that straight up front. She replied that it's okay, just send me a picture of your face. So I did, although I just sent a slightly older selfie because I didnt feel confident, making an excuse that I'm at a friend's place (to cover up the fact that its a different background than the one she's seen). She just replied "oh ok! Nyte". WHAT JUST HAPPENED DID I SCREW UP OR WHAT?