What to do? What to ask?

So I've been dating this woman almost 2 months now. It will be 2 months officially on June 2nd. Everything has gone great until 4 days ago. She has gone into hiding basically and is barely texting or talking at all. I asked her if everything is ok and no reply back. What would you do? She won't answer any questions.
What to do? What to ask?
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