Nocturnal panic attacks

Thanks for all the responses. I know I won't know anything until I get my sleep study but I am hopeful that the anxiety attacks (if you can call them that) are related to my anxiety as they did not start until after a traumatic experience and I have read a lot about others struggling with anxiety having similar experiences.

Odd, but possibly related; I had panicky feeling spells at night for years before I was diagnosed.
I always thought it was stress (lousy jobs, rotten bosses); but it stopped and never returned since I've been on CPAP.

Beth...go through with the sleep study...like Chunky Frog I had those night panics too and at first I thought I had a reason for them, but then over time and things settling down I was still having them. Not every night, but often enough I was noticing that right before I fell to sleep I'd get that feeling in the stomach, like when you go over a hill real fast in your car? Sort of "bottom drops out" feeling is the only way I know to describe it. Having had panics attacks several years ago I did know that the feeling was anxiety, yet I was taking an anti-anxiety med. I remember laying there trying to figure out what it could be that was causing me to do this...couldn't figure it out. I've been on cpap therapy now for just a little over 4 months...guess what...no more night feelings! Like my headaches, they have disappeared since starting my machine!! What is more strange I had even forgotten about having them until just a few weeks ago when it happened to hit me that I hadn't had that "feeling" for months!