Elleise.....were the words you were looking for "diatomaceous earth"? It is supposed to be affective in killing all sorts of bugs, but I have never used it.
From what I have seen about your case it is not the same thing as the mite problem I had when I raised caged birds. I did feel the prick when they bit, but the red spots they left on my skin were very tiny and not in any sort of pattern. They were tough to get rid of but I finally did succeed, although a bunch of those red spots still exist on me many years later.