First off I am really sorry. I have had anxiety attacks and nightmares frequently at night and I think the way that I handle it might be different then the way you might handle it. I am only 16 years old and every time I have one my mom usually sits with me until I am calm enough to go back to bed. Sometimes she even sleeps in the bed with me for the night. We talk about the nightmare or even flashback that may have brought on the anxiety and I even do deep breathing and also write in my journal as well. It is really the comfort of my parents though that helps me through. I don't know your living situation so I don't know if you have anyone available for that comfort. Good Luck and big hugs.