I take WB in the morning and then I take .5mg of Xanax at night. Every night. It helps me to sleep though I don't sleep great, but that is for other reasons usually. I can take a Xanax during the day if I need it, but it has to get really bad before I'll do that because I will not take it and drive or have to be responsible for my kids. This weekend I had a really bad weekend of anxiety and I finally took half of a Xanax and it helped take the edge off, but did not make me drowsy. I think I was so keyed up that it didn't go that far.
Anyway, it depends on how often you feel anxious, but I do know that WB can cause anxiety in some people. Hopefully your pdoc will have some suggestions.