Welcome to the bipolar board.
What kind of test is your psychologist asking to have done? There isn't really a test for bipolar. It's certainly possible if you're having mood swings, but bipolar is more than mood swings. You need mania or hypomania for bipolar.
I have never taken the trazodone or citalopram personally, but I know bunches on people here have, so hopefully you'll get some feedback about that. Thyroid problems can mimic mood disorders as well, but if you've got that under control that shouldn't be a problem (is that the test he wants done?) What ever turns up, you'll be okay. I hope the meds help even you out and give you some relief. Keep writing and let us know how you're doing.
Co-Moderator, Bipolar Forum