Sorry about your slip angharad! It happened quite often with me. After awhile I figured I was "cured" and could drink socially, like one glass of wine. That got me off on to the slippery slope and as I grew older the slope grew steeper so that at the end it took only six days to get me into the hospital. It's really not rational at all, when you think about it, what with the burden of the guilt, anger, hangover, withdrawal, humiliation, whatever (!) all just to get a little buzz going and as time goes on it gets much harder to get that buzz and eventually it's not the buzz you are after but just the chance to feel "normal". Normal!!!! Anyone who would call addiction normal must be really abnormal!
Hope you manage to get back on the track and have a smoother ride ahead. Talk to someone, maybe a sponsor or counselor about ways to avoid slips and relapses. That's very much a part of getting well. Good luck
wp