I just hate the waiting with texts, it's awful. I'd much rather someone simply told me that it wasn't going to work, and left it at that. Now I've no idea what to do if she doesn't respond - do I message her again on Sunday, to check about Tuesday (assuming that I won't get a response, but you never know...)? Or do I assume that she's currently really busy/stressed, leave it until after Christmas and New Year, message her when we're both back down in London and hope that the time at home with her parents has relaxed her slightly?
You're probably thinking to much about this. It's awful when waiting for that reply but it's also awful letting it bother you so much by thinking to much about it. You've already chased up after asking a question previously there's nothing else you can do, if she want's to get in touch it's her choice.
You should try to occupy your free time elsewhere and try not to think on this, better still try moving on, talk to other girls and don't let everyone you like affect you like this when these things happen. When you start asking yourself the types of questions you posted so early after a few dates it's time to move on imo.