I try to sleep when it comes to the night before exams, but I struggle. Not just with exams, but when it comes to an event in college or doing something I'm nervous about, the night before I get hallucinations. Sounds like I'm on drugs I know, but it's a thing. It's when I'm almost asleep and I'm in the wakey-but-almost-asleep stage. I see black shapes of spiders, webs, insects in front of my face, dangling over me, behind me. I always run and turn the light on, run around the house, stand still. It always happens the same way - I move so fast I don't remember jumping out of bed and turning the light on. Then, I can't get to sleep because although I know its not real, I still have the image in my head.
I now have an even bigger fear of spiders, insects and everything else I was already scared of.
But despite that, I was fine. I sleepy in exams, yes, but I passed. So have hope.