hey siljie. I have been feeling the same for some years now. so i will try to tell you what cased this "unreality feeling" for me. also called derealization. First started with depression, then anxiety. small panic attacks, it got worse and worse. and then one day i smoked weed. got a panic attack, worst panic attack i ever had. and i started doubting the world, universe, life. and then Boom, everything was unclear, dazed.
And i feel like im floating when im about the get panic attacks. You should really seek help for this. its hard but worth it. im not yet out of it. but i started my journey into the real world. i wish to see you there one day
If you feel like talking about this feeling, feel free to leave a message or anything. we could both need someone who understand each other!