Weird noises coming from the crawl space

So I’ve been hearing weird noises coming from the crawl space. And I think to myself, I wonder if there’s been anyone that lived in someone’s crawl space before. I locked my attic cause I have that fear but I don’t think there’s anybody there in my crawl space.

The bug man was just there weeks before. Has anyone experienced this before having someone living in their attic or crawl space or do you know anyone that did? I would freak out if I saw someone living in my house like that

Edit: I don’t think it’s rats because we have a pest control out frequently and have poison down. But the noises are more like knocking on pipes and someone like scooting a dresser or something. (Which I know sounds crazy)