How long do panic attacks last

[[An...]]

I’m not sure what happened I started to have OCD thoughts from past traumas, I was micro sleeping for around 30 minutes ( body asleep brain awake ) and then time just went so quick after that I felt like my thoughts and brain were spiralling with no physical symptoms of anxiety just my brain wouldn’t shut off and I snapped out of it 7 hours later: has anyone had this experience? Feels like a out of body experience 

Felt like I was tripping out 

Edited June 22 by [An...]