Hi Hotice, it doesn't sound like bipolar to me because usually bipolar depression lasts at least 2 weeks with the low mood occupying most of the day and mania/hypomania lasting at least 4 days. However, you may have the ultradian form (which means you cycle within the hour) or even BPD.

Then and again, like what the other replies say, I'm not a professional and thus am in no capacity to diagnose you here, so do get your concerns checked out by a licensed psychiatrist/psychologist. I wish you the best of luck.