D.P.
it's perfectly reasonable to prescribe certain antidepressants as an anti-anxiety med. If you're concerned you could ask you doctor about something like Valium -- but then you have to deal with habit forming problems. If the cymbalta is helping, stay on it. If not, you just need to try something else. Next try would probably be Lexapro or Celexa. (Go with the Celexa if you do get prescribed Lexapro because they are kind of the same drug but Celexa has a generic and is therefore less expensive.)
Good luck to you!