How do you get diagnosed with Bipolar? does a Pdoc do it or a psychologist or a therapist? who has the degree to say "You have bipolar disorder."

I need a dx. When I get overwhelmed and pre-panicy, its because I don't understand Why I'm acting the way I am, or what is causing it. I feel like if I had a Dx I could be like... Okay, this is _______, I can fix it by ______. I know bp and other disorders are hard to dx but I need something solid soon. I'm the type of person that if there is a definate problem, then there is an answer, and I get very determined to find it.

If I was told I have bipolar, I would immediately start looking up what it means exactly and what I can do/take/get to make it better, so then I'll have those coping skills to battle it in the future.

But all I know right now is....I have panic attacks. I go from very happy some days to extremely depressed others. I take meds for the panic and now depression. I have problems sleeping and I just want to know for sure what the deal is.