I would not risk it if I were you. There is an argument that if you were not a beer drinker, your brain may not have built up an association between the taste of beer and alcohol. But why take the risk? If there is even a small amount of Pavlovian association between the two then your body may be off and running, like a racehorse that smells the track again. Also the very small amount of alcohol in the "alcohol free" beer might serve as a trigger. Why take the risk? Try tomato juice with plenty of Worcester Sauce and Tabasco to pep things up. A harmless drink with a bit of a kick to it. And it also is a good idea to eat quite a bit. Eat something sweet.
W.