You Should Exercise
Part of what's stressing you out is the anger you feel toward others or the situation you're in.
You don't want to be stressed out, but factors out of your control are really messing with your mind.
You can work out some of those demons in a productive way through exercise. And it can be any exercise you choose.
Go for a walk or a run. Chill out with yoga. Really get out some aggression with boxing. In the end, you'll be glad you did it.