I know the feeling, I felt it a long time ago.

When I was around 7-8 years old, I started having severe panic attacks. I couldn't breathe, so I would start hyperventilating, and my heart pounded like it was gonna explode. During these attacks, it felt like nothing was real. I genuinly thought I was going to die the next moment, even though I didn't. It was the worst feeling in the world. I still remember what it was like, and I don't want to feel that again. I talked to a psychologist about it when I was older, and she said that that can happen when you have really bad panic attacks. If I remember correctly, it's kind of a survival mode to distance yourself from the bad feelings you're experiencing. The others give good advice.

Personally, I think that time is a kind of illusion, even though the world we live in is real. I think that when we die, we will end up in a place without time. My thoughts on this are kinda hard to explain, but what I'm trying to say is that I can relate to your feelings, but I think they can pass.