Esmenonna, all your fall has done is prove that you are an ordinary fallible mortal like all of us, not some superhuman person who never fails.
I cannot think of anyone who has given up anything, who has not had a lapse, or even dozens of lapses, whe it is something really serious like alcohol, or food for the dangerously obese, or heavy smokers with lung disease.
We all aways hear of the miracle workers, who stop and never start but they are a very small minority. Most of us try t stop, stumble, get up go on a bit further and fall again, but the falls get less extreme and the gaps between falls gro longer, so hang on in. Go and see your doctor, find yourself a councellor and keep on with AA, they will support you, you re following a path so many of them have followed