I'm assuming by your user name that you are "bipolar not otherwise specified". Welcome to my world.

A lot depends on whether you're on other meds or just anxiolytics (e.g. Ativan, Klonopin etc.). If not, you are probably going to need a mood stabilizer and possibly even an antidepressant with anti-anxiety properties, like Paxil. The only person who can really determine a proper course of treatment is a psychiatrist; general practitioners and internists aren't as well-versed in the treatment of mental disorders, and they will almost always refer anything more complicated than simple depression to a specialist.

As an example, I'm on Lamictal (mood stabilizer) 100 mg/day (still working up to a therapeutic dose), Celexa (antidepressant) 20 mg/day, and Ativan 1 mg up to 3x/day as needed. I only use the Ativan at bedtime though, to help me sleep. These work together to reduce my anxiety, which I have pretty badly to be honest.

You'll need to work with your pdoc to find the right combination of medications and/or non-drug therapies to help you manage this condition. Best of luck to you.