Reminds me of this movie.

I rarely ever had nightmares, but I used to wake up and see centipedes crawling all over my pillow or giant spiders coming down at me from above. At times I would literally jump out of bed to avoid them. It was just the shadows or my eyes adjusting to the light, probably.

It also happened with a roach once. It was crawling around my cheek and ear, but that ended up being real. Leaped out of bed halfway across the room and slept on the living room couch for the rest of the night. Bugs suck.