I used to take mirtazapine, but that was about 8 months ago so I don't think that would be causing this. If they were to do a sleep study would probably be free here as the health care is. I will go to the doctor and get this checked out eventually when I got the time
Ive had that happen before, actually a lot, at first my cousin was in the bed with me when it happened she said it looked like I was having a seizure, it happened like 3 times in one night, when I went to the hospital they called it a night terror. Since its happened a few times, so my doctor ordered a sleep study which is very expensive, but you should check your medication to see if any side effect is to have siezures. My doctor took me off tramadol and mine have slowed temendously