I don't have any personal experience with pot withdrawal, but I've met a few people who went through it and if I recall correctly anxiety was a big part of it.
I just wanted to say good luck and to take it a day, or an hour, or a minute at a time. You can do this.
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"I danced in the morning when the world was begun. I danced in the moon and the stars and the sun". From my favourite hymn.
"If you see the wonder in a fairy tale, you can take the future even if you fail." Abba