Hi,
Like other people have posted prior, use this event to propel you into sober and healthy living. Things can seem overwhelming and problems insurmountable, but if you keep plugging along they get better. Understand the gravity of the situation and what you did, but try not to beat yourself up about it. You're 27, so you still have a lot of time left to live healthy and be a positive influence on the world.
We can't change what we've done, but we can control where we're going.
Stay well.