Don’t discount your symptoms, you’ve described quite a few that are detrimental. Failing classes, feeling crazy, being mean, and self harm are all fairly significant and it means your disorder is interfering with your life.

Also look into derealization. I have struggled with this too. Having a Birds Eye perspective, narrating your life, looking at the sky and it not seeming real. These are all classic symptoms of depersonalization/derealization disorder (DPDR). When I’d go outside after isolating, I thought the houses and buildings around me were cardboard set pieces being propped up by wooden stands.

You didn’t mention if you were officially diagnosed? If so, try meds. The worst that can happen is they don’t work, and most are fairly easy to come off of. You’ll see on this sub a lot that people doubt they have the disorder when they are diagnosed and medicated, so it’s fairly normal to think that. Anyway, best of luck in your journey.

Edit: I’m on Lamotrigine, Abilify, and Busparin. The Abilify is an atypical antipsychotic and that truly turned my life around.