The severity with which one goes up and down is striking. You seem to make good progress and then wham! suddenly you slip right back down and are struggling again. Last week, which was the 4th post-treatment week, was a case in point. I had my first drink in a cafe for well over six weeks. It was only sparkling water but hey, I could drink it! I even went to the beach and paddled with the kids in the sea. But then it…