You should definitely see a Psychiatrist to assess for Bipolar, since it may or may not be. There are other causes and diagnoses that overlap with these signs, so only a doctor can make that determination.

I'll definitely say that while these online tests can work as a guideline, there's a lot of room for error, and they do not take into consideration other factors and possibilities. No matter what the diagnosis is, I can definitely see therapy being beneficial (one that is a good fit for you) to help you work on these issues that are causing you a lot of distress. Best wishes.