Don't sweat it
Meaning/Usage: To tell someone not to worry
Explanation: When people worry a lot, they can sweat. This became a popular way to tell someone not to worry.
You can't do anything about it, so don't sweat it.
You tried your best, so stop sweating it.
A:
I'm worried about my final examination.
B:
You didn't take it yet?
A:
I took it yesterday. I'm not sure how I did.
B:
If you tried your best, there's nothing you can do about the results, so don't sweat it.
Other Common Sentences
Don't worry about it.
Nothing you can do about it.