What I like to think, is this:
You are one game away from 2400 Blitz, but even if you lose it, it's no big deal. You will, given enough time, eventually get BACK to being one game away from 2400 Blitz. And even if you lose that one, the opportunity will arise again, and again, and again. As long as you keep at it, you will reach 2400. Even if it's not today, or tomorrow, or next week, this game is not THE game. If you lose this game, you'll still get that chance back again someday, over and over until you finally win. And all it takes to reach 2400 is to win ONE of those games.
Don't worry. Don't stress. Even if you don't reach 2400 this time, you'll get the chance again. You've got this.
EDIT: I checked your profile page, and wow, you're 15 and 2400?! Congratulations! AND you've only been playing for a year?! You're a prodigy, dude. Also, I apparently posted this too late, you're already at 2400, lol.
Zen mode