Though it's hard to stay calm during times of difficulty and anxiety, stress can inhibit your ability to remain unyielding. The ability to manage stress will keep you in trouble with a very calm and focused mind, instead of burying yourself deeply and trying to hide. Prioritize to manage stress, no matter how busy you are.
If you have too much work to do and you are not sleeping, see if there are any promises that can be canceled.
Do activities that make you really feel relaxed. Give yourself space and calm in order to relax regularly, so your ability to abstain surrender increases.