Don't be too hard on yourself.
Don't push yourself too hard.
Don't overdo it too much.
Don't overdo it and wear yourself out, now.
Don't push yourself too much.
Don't overdo it too much now.
Please don't be that depressed.
You don't need to be so nervous.
You don't need to be that high strung.
Don't be too hard on yourself.
Don't push me very hard. It's dangerous.
Stay calm, and do your best.