I really hope you don't try to sober up on your own, especially with that amount of drinking. It would be a lot easier and much safer to either go to an ER or see your doctor. As was said before, your family probably knows you have a drinking problem. Pretty hard to drink that much and your family not knowing anything about it.
TBH, admitting yourself into a detox facility would be the best thing you could do right now. It's a tough decision, but you wouldn't regret it. Take care. John