Hi,
Anxiety is hard to deal with. And, if allowed, my mind will wander back through the day and pinpoint everything that happened that wasn't right. I have tried to learn to not judge myself and to not expect perfection. Everyone makes mistakes and I sure do too. I also try to turn off the thought patterns that happen to me, usually late in the evening when I'm tired, and focus my head on something pleasant. It's hard and it doesn't always work, but it helps.