There are different kinds of bipolar disorder. theres mixed bipolar....and others. I have lots of racing thoughts that I associate with being bipolar. but i do have OCD and cannot stop a thought until i have over processed it into the ground. So imho i think it sounds llike a combo of both bipolar and ocd. you should talk with your T regarding the obsessions. I had my mom tell me to write a spreadsheet of my ocd issues. I have issues with hoarding and obsessing over just about anything. and until i see it in black and white i keep obsessing until i wear myself down. the lack of sleep is part of being bipolar. Im sure others with more experience here will add theyre opinions.

Hope this helps. Hope you can feel better too. Also have you tried journaling to see if anything triggers the obsessive thoughts? I do and sometimes it does help.

Take care,
colleen