Girls, Is it bad if I asked a girl out then not heard from her for a day?

She and I arranged a time and place for date. I met her online so it's our first meeting. We've been speaking heaps and we are meeting in person for the first time on Saturday. Should I be worried that I haven't heard from her today?

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The girl said yes by the way
Girls, Is it bad if I asked a girl out then not heard from her for a day?
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