afaik, you'd want to look for little black specks under your mattress - on the underside, on top of the box spring, in the seams around the edges, etc ect - that don't just want to brush off easy?

and of course the bugs themselves, but those move fast.

My best advice is to get some diatomaceous earth and spread it around on your floor, especially around the bottoms of your furniture and bed's feet and such. It's basically rock dust, and will dehydrate them

to death by disrupting their shells, or something like that, iirc? :/a ....but careful when you spread it around; I'm sure it can't be fun to inhale. (I've been careful myself, heh.) It's VERY fine powder.

It wouldn't hurt to ask if a pest-control service would be willing to check for them, imho. They may be able and willing to do so for free. Dunno if they'd find them unless they'd established themselves, tho/

get fully mattress-enclosing mattress covers, just in case, to make it harder for the bugs. And apparently they can be killed by really high (or really low) temperatures, too. Might look that up?

also, apparently they'll only really care to stay within ~6 feet of their food sources (aka people. more specifically, the beds.) so I doubt you'd need to search the far corners of your room, fwiw.

and of course, double-check all of this somewhere, verify it (to the Google! \o/) since this is just what I know from my sister losing her shit. (STILL no sign of them in my room. Just downstairs.)

(but we're having a pest control guy come and do all the bedrooms in the house, just in case, because better safe than sorry. There is zero need for her problem to spread anywhere else.)

Okay, so basically, I have nothing to worry about. His apartment was basically his door to his room shut constantly. Only thing I ever did was store my coat in there for a couple hours here or there.

To keep it away from the cats (he has three).

maybe? Where was your coat exactly, on his bed or something? :S

Naw, on his dresser a ways away from the bed. I never placed anything on his bed.

hm. Might be fine? But stay wary anyway, because better safe than sorry: if you basically bake your coat in the dryer after washing it in hot water, it should be fine if it did have any?

look up about heating them to death, just in case, for your coat?

I sincerely doubt it, but.