You're too young to be going through this anxiety. That'll come later in the "years of responsibility". Take all the things you worry most about in your situa

You're too young to be going through this anxiety. That'll come later in the "years of responsibility". Take all the things you worry most about in your situation and assume they are true. Assuming they're true, then what? From that answer do the same thing until you can't cone to any more negative outcomes. You'll be surprised what you learn about your mind and the true cause of your stress (not so much the 15 hour days). At the end of the day, you're 23 and have the world by the balls. Open your mouth and let your superiors know that it's too much for one person. Worst case scenario, you walked out of there with a valuable lesson and probably working in a better environment somewhere else. Keep your head up and blood pressure down. :)