Does your brain give you your sense of self?

So if we have a brain, that means we always have hope? Our brains are doing this to us?

My brain has totally shut down. Body feels so weird but it feels like there is nothing there. This if probably one the worst panic attacks I have ever had. A

I can't concentrate and i feel completely. Where my head is it feels like it is just air. It's like I don't exist at all.

I haven't slept in a long time. My won't do it and i just get so frightened by these symptoms. I have totally disconnected.