welcome, Grim_potato!
First of all, rest assured, your English is very good and your writing is clear and easy to understand. (In fact, if you had not said so, I wouldn't even have realized it wasn't your first language! )

We've got to leave diagnosis to the professionals. That said, it's possible that it could be bipolar. You said at your most recent stay, the doctors had mentioned it as a possibility. Were they regular doctors or were they specialized in psychological issues? (Non-specialists really don't have the knowledge to make good determinations.)

Skeezyks makes a good point. Even among specialists, there is not always agreement, and regardless of their conclusions, you are you. Diagnoses don't change that. Diagnoses don't define who you are.

Psychiatric issues can be quite complex, and there are symptoms that various diagnoses have in common. It's not always as clear cut as people would like to think. The important thing isn't the label, but finding strategies that work for problematic symptoms.

Would it help knowing that your current situation is shared by many? You are not alone. Big episodes can throw one for a loop. It's not just like you're going to jump back into everything feeling 100%. You can get there, but it takes time. Be gentle and patient with yourself. Don't overwhelm yourself with the big stuff. It'll just make you feel crappy (as you know). Start small. Take it one step at a time. Focus on things in do-able chunks. Each small accomplishment builds a base for the next.