Welcome, you've made a great decision.
Just so you know, luck has nothing to do with remaining quit. Remaining quit is an active decision we make every day.
Go to the August quit group, and learn to post roll:
https://ktcforum.org/index.php?topic=16445.0By posting roll, are making a solemn promise to yourself, other members of your quit group, and everyone posting support that you will not use nicotine in any form for the rest of the day. Make your promise, honor your promise. Quitting is that simple - hard as hell, but simple.
Exchange digits with members of your group, and some vets too. That adds a level of accountability. Mine are a PM away.
I don't have much to say about the anxiety, other than to keep yourself active. Read all you can here on the forums. If exercise is your thing, do that.
Whatever you do, don't go back to the gas station. Use pay at the pump for a while when you do need gas.
Proud to quit with you.