Please be honest with your pdoc and tell him EVERYTHING. Psychiatrists are like everyone else: they can't help you if they're getting only part of the picture. I know all too well how hard it is to be truthful, but believe me, it will benefit you in the long run. Your doctor isn't there to judge you---he's there to help you figure things out, and then work with you to find the right treatment.
A word of caution about the Celexa: if you are
bipolar, the drug could tip you into hypomania or even full-blown mania if you take it without a mood stabilizer. This is how a lot of us wind up with a BP diagnosis---we see a doctor when we're depressed, are given a script for an antidepressant, and sooner or later we switch into some variety of manic state. So be careful, and be sure to call your pdoc if you notice yourself ramping up moodwise.
I'm not going to tell you that being officially diagnosed with a mental illness of any kind is good news. It's a total game-changer, even if you're like me and suspected it for years. Yes, it does explain a lot of things that happen in our lives, a lot of the things we do to hurt ourselves and/or loved ones, but when a doctor pronounces the words it changes life forever.
BUT---you do not have to let a label define (or defeat) you.
Even if you do have to share this information with the BON in your state, you cannot be denied licensure or renewal only on the basis of having a mental health diagnosis unless you are impaired to such a point that you cannot practice safely. Such a diagnosis alone doesn't render you unable to be a safe nurse; as long as you can show you are compliant with treatment, you shouldn't have any difficulty obtaining or keeping a nursing license.
You MIGHT have to enter a monitoring program for health professionals; it depends on the state, and I'm pretty sure the severity of your illness would be a determining factor here. Bipolar II is generally less severe than Bipolar I and tends to have milder manic phases (although some of us have some real humdingers!), thus it would probably raise fewer alarms with the BON.
Anyway you slice it, bipolar disorder really does complicate life, but it doesn't have to ruin it. There are a lot of nurses with this illness, and for the most part we manage just fine as long as we are properly treated.
Don't be afraid to tell your doctor the truth, the whole truth, and nothing but the truth......the sooner you know for sure, the sooner you can get started on reclaiming your life!