2 weeks of texting, first date where she asks for a second date, then ghosts?

I (26M) matched on hinge with 23F. We had a great back and forth on the app, which led to her asking for my number. We then texted every day for a week and a half to where it was rare 15 minutes would pass without a text from one of us. We finally found time last saturday to go out for drinks. It was a touch awkward at first, but we ended up hanging out for 4 hours and had a great time. As we left, she said she would love to go on a second date and I agreed. We texted late into the night and all was well.

Or so I thought. Sunday morning she reiterated via text that she had fun. I replied that I agreed. However, things began to feel off as the day went on—fewer texts, less enthusiasm, etc. This doesn’t typically get to me (I’m not that into texting to begin with, but am making an exception here), but I wondered if she was insecure I didn’t enthusiastically reciprocate that I had a great time. So I said “just to be clear in case I wasn’t before, I had a great time last night and am excited to see you again.” She replied that she agreed but I was getting too sappy.

The last couple of days have been little to no communication from her. I haven’t followed up/double texted, but it’s certainly weird considering the past couple of weeks. Should I just cut this one as a loss since it’s too tough to tell why the sudden change? Or reach back out in some fashion to try to get the ball rolling again?