I've been there a few times but it isn't common for me. In fact, the last time I thought I had "died" was soon after my first surgery back in 2014. It was a terrifying experience that I chalked up to being exhausted. Looking back, I know now that I was dealing with psychotic features along with extreme anxiety. Mix those with lack of sleep and they'll intensify. The lack of sleep can't be good for both your seizure disorder or your psyche. That's something that should be dealt with right away.