An Illinois Reddit user found something pretty strange on the floor in their home and can't identify it. Do you have any idea what it is?

I'm not an entomologist, but I know someone who is, and I sent him this picture. And upon one quick look he said it appears to be some kind of beetle.

What do you think this little creature is?

Need to identify insect and its family. Northeastern Illinois. from whatsthisbug

The bug is probably harmless, but why does it never feel that way when you look at them. Every bug I see, I think about it crawling in my ear or mouth while I sleep and multiplying and killing me.