I agree, Anxiety is a tough thing to deal with. Especially if you start to obsess.
I have to just go somewhere quiet and just calm my mind. Listen to my surroundings. Be in the moment. And if that doesnt help. Then do somehting that may ease my mind on the situation. Like finding out what the result of my action will be if I can. Get the waiting over with. And humor is always a great way to ease that discomfort.
Like Tommy said. Acceptance is huge. Some things you just cant contol. So no use in trying to or worrying about it until that time comes. I know easier said than done.
I find a nice hot bubble bath is really relaxing too.
I hope you feel better soon.