So I’ve Been Worried That I May Have Bipolar Disorder

So I’ve been worried that I may have bipolar disorder for quite a while, I’ve already been diagnosed and am in treatment for OCD and depression, but I’m worried that the depression may actually be just part of the bipolar disorder. It’s a common issue in my family and I believe it can be hereditary. So my symptoms are these:

I have these sort of phases where I go through like really depressive states, like I can get really suicidal and just unbelievably low. And I can go through phases where like I feel constantly up. Like I feel like I can do pretty much anything and I just feel so much happier and excited by everything, and like I’ve gone nearly 3 days without sleep cos I just don’t feel the need to sleep, or I can go for a week or two with only 2-3 hours of sleep a night. Can anyone tell me if it could be true?

Anything is appreciated, thanks.