Am I overthinking or she is really being distant?

I started talking to someone a few weeks ago. Things started great, and our first date went well, but she left for a trip shortly after. Her texts have become shorter and less enthusiastic, and I'm unsure if I should bring this up or just wait for her to return. Should I talk to her about it, or am I overthinking and need to be patient?

Am I overthinking or she is really being distant?
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