Ummm I take cymbalta for anxiety and it works quite fine.... Im pretty sure that a lot of people take it for anxiety/depression
Cymbalta is not indicated for the treatment of anxiety disorders. This is an adrenergic agent that primarily effects the turnover of Norepinephrine in the central nervous system. The drug is a stimulant, which is why it is used to treat more severe forms of endogenous depression. Therefore, it is more likely to worsen anxiety.
Never-the-less, the drug takes several weeks to accumulate to a steady-state (therapeutic) level, and adverse reactions would not appear following a single dose. That you were "okayed" suggests a lack of physiological findings, and your experience is more indicative of an anticipatory reaction (ie: you were likely nervous about trying a new drug).