Meggy,
(((Gentle HUGS))). Yes, the previous posters were 'spot on'. It doesn't matter if he's had a drop or not. Al-anon helps YOU recover from the effects of what's already happened. It helps YOU work through this anxiety you're feeling, whether he takes another drink or not.
If you focus on you just a little bit, you'll notice you won't be tempted to watch his every move. Did he drink? Did he act ugly? Wasn't he nice today?
Al-Anon, the readings, these boards, my spirituality has helped my growth and even though my RABF and I are miles apart, our relationship is much better. I believe it's the by-product of each of our individual work. I don't believe we would individually feel better as a result of a better relationship. Do you see what I mean? The cause and the results are put in their proper perspective, and I can report a much happier life because of it.