Le sigh. I pretty much knew this.

I've tried all the allergen covers, the sheet washings in extra hot, vaccuming with a HEPA filter....all to no avail.

Finally said fuckit, I'm not wasting my money on expensive treatments or covers. I do still wash my bedding in hot water weekly though, since that takes little effort, and I love nice fresh smelly sheets anyway. And I still vaccuum religiously, as I am not that crazy about cat hair. (No, I am not allergic to them, oddly enough. Dogs though...)

I found out I was allergic to dust mites when we couldn't figure out wtf was causing my breathing problems, so I went to the allergist. They performed the full set of prick test on my arm, and the dust mite spot actually swelled up so much that my wrist and lower arm were stiff. Allergist actually called the whole office in to goggle at it... heh. That's when you know you've got something bad, when even your doctor freaks out.