What would you do if your partner went silent?

Apparently I've upset my girlfriend to the point she's gone quiet. I can't think of anything I've done wrong. Everything was going well until this past Wednesday when I had to re reschedule a date due to something I had no control over. We rescheduled until Thursday and then she didn't show up when it was time to meet up. I didn't hear from her again until late Thursday night saying she slept all day and apologized for not showing up. That's where she disappeared, I've only heard from her once when she sent a text saying that there was an issue we need to talk about but she needed to calm down and let her feelings level off. I do admit I text her I called and texted her a few times to see if she was ok. Of course I never got a response. Apparently I've done something that she is upset about, I don't know what it is. I just wish she'd talk instead of hiding. What are y'alls thoughts.
What would you do if your partner went silent?
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