Optimism Online - track your moods and states of anxiety - from now until the psychiatrist will see you. Then, print out your mood chart and discuss with the psychiatrist. Even if you only have anxiety without any mood disorder, tracking anxiety will be informative and might give you a clue as to what triggers you and what makes things better for you.

As SalaciousD said, Valium can cause dependency, and, speaking more generally, all drugs of the same class as Valium can, so non-pharmacological tools for reducing anxiety would be important for you - that you will see a CBT psychologist is great in this regard. CBT will equip you will skills.