The antidote to worry about losing your job is to make yourself all the more valuable. Manage your weight. Stress can lead to overeating, and being overweight is stressful. Don't eat for relief. Negotiate your work environment.
Stress can come from noise, an uncomfortable chair, or poor lighting.
Ask for improvements. Pet your pet. Sometimes we need a nonjudgemental friend. Quit the booze. The stress relief is only temporary, and temper control suffers.