Thanks for all the good advice. Expectations are clearly an issue. I'm coming off the back of a good run without cravings and free of depression so I have "expected" that to continue and found myself a little surprised when it didn't. Oh well!!! Time to rally and find that strength that has got me this far!
I went shopping for a book for my kindle yesterday and I read a review about The Complaints by Ian Rankin (who's stuff I have always loved). When I read that it's about a teetotal detective wrestling with his boredom in a world governed by an intense drinking culture (I paraphrase), I pressed download on the spot!.
It's nice being sober because now I remember what's happening in books from one sitting to the next and don't need to backtrack hardly at all anymore!