Re: What do you do when she comes back?
I've dealt with this before, and here's what I can tell you: unless it's text, it really doesn't mean anything in most cases. I almost never use my Snapchat anymore because all people use it for is to spam others about what they are doing. There is a slim chance that this isn't the case, but if you do respond to her snap, she won't reply back, or the interaction won't go on for very long.
Everything I have said above has been geared toward the likelihood that a Snapchat pickup can happen, but it isn't likely. I personally wouldn't reply. If she does end up sending you a text message, then just spit some text game and get that ball rolling.
"There is no better than adversity. Every defeat, every heartbreak, every loss, contains its own seed, its own lesson on how to improve your performance the next time." - Malcolm X