I met a girl a few weeks ago through an organization at my school, and we hit it off pretty well (Or so I thought). I got her number, and we met again a week later. We met more through meetings, etc. but didn't really get a chance to meet up alone because of mid-terms. The first "date" ended in a flake, as she had to help a friend out with some stuff on that day (Mostly believable, since that week was crazy for me too). I didn't think much of it, and tried to contact her again a week later, today. No reply for a day so far (Active on FB), and idk why. Another thing is that she lost a really big competition for that organization that I was in as well and had to leave while I got to stay, if that affected anything. Any thoughts on what to do next?

I could try to open her up at school, but should I bring up her non-response? Or do i just text/call her later like it never happened?

She just seems dis interested at the moment. If you see her around school just go up to her and talk to her to feel out her vibe. Go in with a normal vibe like nothing happened. Do not be affected by her earlier flake.