I live up in Canada and got this condition this past summer. 3rd month now and think I might b making some headway.
I see the white grain looking salt spec, black dot spec, white lint bits, other color lint. I use tape and pick them up. Mop my floors w bleach often.
Get a clothing steamer (I got one 1550w, brand begins with "R", says can kill bedbugs) and steam bed sheets and duvet. The bug camoflouges in the fabric. After it gets steamed over, this thing shows up looking like lint. I believe it's the cotton bug. This thing is in the air and is hanging around walls and ceiling. Have a look at your toilet paper. I can see them in toilet paper, paper towel.
Quarantine your clothes and use only a few item of clothing, keeping them in plastic bags after they are treated.
Get dettol (antiseptic, brown color)from Walmart either in laundry/pharm dept. Dilute it but keep it on the strong side. Put it in a spray bottle. I sprayed my walls, ceiling, sheets duvet everyday. Get a fan to dry out walls after spraying.
Soak your clothes at least 4 hrs with dettol to really kill bug before washing it.
Get an airPURIFIER (I got a sharp). Purifier the air in rooms u spray w dettol.
There's talk about it on the Internet. Albama issued warning about this thing being in clothing.
Bath: get a bath glove ( a coconut twine looking one I use) to scrub body and u will see the brown dots come off body. After, coat your body w OLIVE oil( antifungal). Olive oil suffocated the bug by clogging pores. Sometimes I change it up and use a strong bottle of alcohol(gin) and dip a cloth in it and scrub down head to toe with it. Do the alcohol thing 3 times a day. Btw, see if you have candida. This bug eats the fungus off your body. So then u might have to change ur diet and quit sugar and carbs. I get on YouTube and listen to frequency tone for candida to try to get rid of it that way too.