Ethanol is a funny intoxicant. It brings out the best and worst in people. I'm a chill player normally, and even MORE chill when I'm intoxicated (also, I only play bots when I'm truly drunk - I'll play a tipsy ARAM now and then though).
People who are normally prone to frustration and rage will show MORE frustration and rage when the liquid lubricant hits the brain.
And every drug is different. I try not to play with opiates (prescribed, of course) in my system. Just makes me cranky. It's bad enough my wife and fam need to put up with me when I'm medicated. The people in league shouldn't have to as well.
My suggestion: make a new account, and don't play intoxicated until you're positive you know how it will affect you and that you can handle it.
Alternately: Throw yourself at the mercy of the support staff. Let them know you screwed up. The worst they can tell you is 'no'. And then you're no worse off then you are right now. And maybe, just maybe, depending on severity of your behavior, they might reduce it to 14 day suspension. It's extremely unlikely, but we've seen it happen in edge cases.
Stay sober mate, and good luck on the rift.