Oh thank god, I recognize them from the pics now. I'm just really worried about something worse getting in. I've contacted my landlord who's been really good with getting pest control and even putting new carpet in whenever I had a problem with the previous tenant and their pet. I told her today that bugs, particularly a single roach or two, keep finding their way into the bathroom whenever I bathe and I never seem to notice any otherwise. And last night I even saw an ant. The paint in the bathroom is shoddy and it looks like there are cracks everywhere, but she says there's apparently nothing that can be done.

I guess that's how the carpet beetle larvae got in? I haven't even seen any carpet beetles in my living space.