Stop. Take a moment to breathe. Remember that every second that passes by is another second that you've been breathing, fighting, living. Every second that passes by, every minute, hour, day, week, month, year, you've made it through. Even if it is only a moment, be proud of that moment that you're still kicking, not letting this world get rid of you yet.
Breathe, and be proud of yourself because you're still alive, and things will get better.