A bipolar diagnosis is not to be taken lightly. And if you need meds, you will have to get a psychiatrist's diagnosis, because psychologists can't prescribe. So it's probably best to get that verified by a psychiatrist, and with something like this, a second opinion is not a bad idea either.

I actually got a bipolar ii dx four times before the psychiatrist's office made it official and started prescribing mood stabilizers. There was no way I was going to accept this diagnosis and those meds if I didn't feel sure it was for real. And I'm actually still not entirely convinced, but by the time the fifth mental health professional said "bipolar" I figured it was time to get with the program.