Part of what's stressing you out right now is not having all your thoughts sorted out. There's a lot of confusion and chaos going on, and you need to get a handle on it all. And there's no better way to do that than to start writing.
At first your journal make not make sense to you, but that's okay. Just writing things down will help you. Over time, you'll find that it's great to have an outlet to think, vent, and dream without judgment. Just make sure to put a lock on that journal!
Part of what's stressing you out right now is not having any control over what's happening to you. And while you can't control anything in your life, it may help you to learn how to stay tranquil.
Meditation will help you learn how to let go, push through barriers, and live in the moment. It may be difficult at first, but if you stick with it, you'll find that meditation brings you some of the peace you're seeking.