Someone might be dishonest or not tell you the whole story. For your own peace of mind, check the facts for yourself.
It's your disposition that helps decide how you will approach or tackle a challenge. Some people see the problem and shy away or complain, whereas others see a challenge that they want to overcome. When your next problem comes along, think of it as a challenge, flip the switch in your brain from negative to positive, and be solution focussed.
If you've been putting in long hours at work, ensure that you take proper breaks to help reduce your stress.