Girl I am dating seeing/texting multiple guys. What should I do? Is this normal?

Been dating a girl since late September, and last week she lets is spill that she is seeing/texting other guys while dating me. She states that she is 30 years old, and says something about her biological clock. So she is dating a couple guys at once, but I didn't ask how many. She says that right now I am by far the best man by miles compared to the other men, and she has only kissed me, and no other guy. Is this normal? I only ask because I am a doctor that recently graduated from residency, and spent the last 12 years under a rock in the dating scene.

So is this normal for women to do this? I don't feel like it is normal, or acceptable to me? Do I have the right to be upset? She sounds like she is just looking for the next best thing. I am right?

this isn't normal
this is normal
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Girl I am dating seeing/texting multiple guys. What should I do? Is this normal?
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