Do I ask her out again or move on?

So i've been talking to this girl for a while and I asked her out she said yes and then couple of seconds later tells me she has a test and can't come so i told her to let me know when she's free, been about 2 weeks since that day haven't heard from her anything regarding the date. still texted me couple of times and flirts over text. Did she reject me or waiting for me to ask her out again?
Do I ask her out again or move on?
Post Opinion