Hi. Yes this has happened to me. It can be scary and disorienting. But now that its happened a few times I know what it is. I tend to see bugs or mice. eek

But it goes away in a few seconds. It is amazing, they look so real. The mind is incredible. Do you have a gp, or a therapist or pdoc that you see now? You should tell them about this if it is happening frequently. It can be very jarring. Maybe your doc might be able to recommend a sleep doctor.
E