Well, to assume that a simple one-day suspension is going to ruin your life from here on out is a bit of a hasty assumption. I wouldn't think too far into that.
Secondly, I will say I've struggled with thoughts of suicide, as have many people. Although I can't say I'd like to recall the situations in which I felt it was a necessary course of action. Just know that suicide is most certainly never an answer to scenarios like this. Being able to get up and prove you can overcome these struggles is incredibly impressive to most people and I believe you're capable of doing it too. No one comes into this world without purpose, and by offing yourself so soon, you're leaving the world without offering what you are obligated to.
So here's my approach to it, as is the approach of Tyler Joseph, the lead singer of a band called Twenty Øne Piløts. Make something, whether it be writing something, creating a new word, singing a song, composing a piece of music, sculpting something, creating something that has only significance to you, and don't tell the world about it. Keep it a secret. You are the only one who knows about this, and you are the only one who understands its significance. By ending your life early, no one in the world will ever be able to know its significance, and you will have left the world without offering up the purpose you found in what you created. So every time you think about committing suicide, think back to what you've created, and how it will never be appreciated if you don't live long enough to tell the world.