[bug hunting]

I have been fitting a bug for 3 months, I never see the bug just their tiny bites in my body. We have look for bed bugs and found nothing. I have been treated for mites and only when I'm on the medication they do not bite me. They are on the cars and the house, shoes, cloth and I think the beds but not sure about the beds. They do seem to be on the sofas and also in the dinning room chairs and table.
Every time a check my cloths I find little black dots all over, some times they seem to be fibers other time if I look under a microscope it look like feeses.
Help please I have used a lot of insectisides and natural things but nothing seems to work.

[Catsmine]

Let me see if I've got this straight.

You have been diagnosed with mites.
The medications provide relief but only while you're on them.
At home you find signs of an infestation such as fecal pellets and "fibers."
The insecticides and natural products have not eliminated the infestation.

Now I need to ask a couple of questions.

Did the people that gave you the diagnosis say what kind of mites?

Have you treated the entire house or just those items that you thought were infested? Did you treat the surfaces or did you take things apart to treat?

I have some suggestions but they depend on the answers to my questions.