Why would a woman ghost after a great first date?

I've been around the block a few times now. I though I've seen it all when it comes to dating and mostly it doesn't phase me.
But this situation is truly eating away at my sanity.

I went on a date with a girl last Friday. We went to grab a drink at 7 pm and ended up staying there talking until midnight.
We clicked in a way that's beyond perfect. We have just about everything in common. Any point of compatibility has us compatibility.
We where laughing and joking and flirting and couldn't get enough.
You can cut the tension between us with a chainsaw!

And then I walk her home and we make plans to meet up next week.
I leave. And later text her goodnight, she replies still telling me how much fun she had.

And then for 3 days (sat, sun, mon) I don't hear from her.
I texted her Saturday, nothing.
I waited on Sunday, nothing.
Texted AGAIN on Monday, still nothing.

And it makes absolutely NO SENSE. I understand if the date was average that someone might change their mind. I've been let down or ghosted on before.
But this girl. Everything was pure perfection with her.

Now I'm wondering if I wait (today is still Monday night) and hope that she just got busy and didn't check her messages.
Or do I send her a message [on her phone and not on whatsapp] calling out the situation and saying:

"Hey. I had a great time with you Friday and could've sworn you did too.
So I'm texting you here just in case my other messages didn't reach you for some reason.
If for some reason you changed your mind, there's absolutely no hard feelings.
Just let me know so I can stop bothering you."

I'm open to suggestions before I send it because I don't wanna come off as butthurt, needy, or depressed. I definitely wanna seem chill, neutral, and still very much intersted.
Why would a woman ghost after a great first date?
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