There has been a span of 8 months that I wake up gasping for air, feeling like I can't breathe. I've done a sleep study and it was determined that i don't have sleep apnea. I don't understand why I breathe better while I'm awake, and feel like I can't breathe at night. My psychiatrist gave me lunesta to sleep, but I've been too scared to take it. I'm scared it'll slow my breathing down while I'm sleeping. The last week or two I have been sleeping better, until tonight. I woke up tonight feeling like I couldn't breathe. My vision was different and i felt cold inside. I noticed my hands started to get sweaty, so I got up to get some water. I started feeling hot as well as cold inside. I drank water, hoping that it would help. Everytime I had tried to sleep in the last hour, I start getting these symptoms again. I don't understand what's going on. I'm scared to go back to sleep now. My psychiatrist also perscribed me prazosin for nightmares, but I haven't gotten it filled yet. She is convinced my sleeping issues are happening b.c. of nightmares from ptsd. I'm not sure I'm convinced. I don't remember dreaming a lot when I wake up. Does anyone else have things like this happen?