Hey man, it's no big deal. A little drunk drama is nothing. In a week your bad feelings and shame will be a thing of the past. You were 1 year sober, most people can't get 30 says sober. A 3 day relapse is nothing. Just hop back on the sober train, and be relieved that you never have to feel like this again, by simply not drinking.
And trust me, at this point, your body and mind are more accustomed to being sober, than being drunk. So being sober from here on out should be a very easy thing for you.