I'm sorry! It sucks that you were kinda accidentally outed, but I mean, did she react to it? I'm sure she'll still love you the same. It just might take her awhile to readjust to the idea... For some reason that affects how people identify you and it fucks with them bc they had one idea and then it change. Did that make any sense?
I honestly think the best thing to do is to not dwell on it. It's really tough, but it's what helps me the most... Just try to occupy your thoughts by singing along to music, or reading your favorite book, or watching your favorite movie anything to distract you. Because it's pointless to worry over something and scare the crap out of yourself and tire yourself out from it. All you can do is wait for her reaction, or if you want you could ask her about it.
Another thing that helps is imagining convos w. the person to get an idea of what you could say in that situation. It'll prolly make you feel a little more secure about it bc you'll feel more prepared.
I hope some of this helped. <3
Just hang in there, we're all here for you.

I know there's "black sheep," but what about rainbow ones?