You are absolutely not alone in this. I go through periods of nocturnal panic attacks. In my opinion, I would rather have panic attacks all day than to have one at night. They are completely scary and come and go on their own. One way I've tried to keep them at bay is meditation before sleep. Going to sleep stressed will contribute to the frequency and severity of the nocturnal panic attacks. I have a fear of sleep so I also take medication at night to help. Hope things gets better for you.