How to handle it tomorrow my first day at new work ?

Fofaa
I had been waiting this job for 2 years and 6 mounts until they accept me. I have social anxiety. I begin my first job tomorrow but I'm super nervous and shaking. I can't stop thinking about it. And now I don't want to go. I'm going to feel so uncomfortable and I will be shaking. What can I do to not feel like that?
How to handle it tomorrow my first day at new work ?
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