First of all, welcome to the forum!!

As has been said, we cannot diagnose you.

That said, something stuck out to me, though maybe I've misunderstood how you explained it. It sounds like you bounce from one mood to another with great frequency, whereas Bipolar Disorder has a habit of each episode (depressive hypo/manic) lasting for at least a week. Moods lasting hours to a few days can carry different diagnoses than Bipolar Disorder.

It sounds like you've been keeping track of your moods, but if you don't already, I would suggest you also keep track of how long those moods last. And then bring all of this information to a psychiatrist. He or she may need to get to know you first (I'm very leery of pdocs who diagnose during the course of just one session), but I think that visit would be very important.

As I'm sure you know, it is essential to get the right diagnosis in order to receive the right treatment. If you have Bipolar Disorder and medications targeting this will help, then fantastic. However, if you're dealing with something else, you might be able to skip the sometimes horrible side effects of these meds and, for example, do DBT instead.

Best of luck on your journey and I certainly hope you find the help you need to start feeling much, much better!