Depends. Sounds like anxiety. If you are seeing things, could be psychosis but then you'd be misdiagnosed.

Try not to overthink it. If you're anxious, tired, focus on "seeing stuff"...you'll scare yourself.

The fact that your questioning at all means you're lucid. That's good. And hallucinations and delusions can get so "real"....well, you're not there. That's good.

Call your pdoc if it continues.