Do any of you tend to have panic attacks at night?

Usually that's when I have mine. At least, I used to have them a lot more at night when I didn't know what they were and thought I was dying or having mini heart attacks. It was harrowing to have to go through that alone...once at college, I was so afraid I thought I was having an allergic reaction so I called 911 and went to the hospital...in an ambulance.

I guess I just get tired, and all the odd or extreme thoughts my daytime mind would have discarded just began flowing uncontrollably. Or I'd just be panicked because I tend to be unable to sleep on nights when it's most important for me to get up early the next day well rested.

The worst thing is when there's no one to help you. I wonder what I'll do when I move out of my parents house? At college I was helpless. At least now I know what's happening...but what do you all do to stop the panic attack? And how do you calm down after?