Do you have an Allergist? If not, you probably should see one for a good allergy work-up and they may be able to tell you whether or not the dust mites (or anything else) are responsible for your symptoms. Also, food allergies can cause Asthma, so you might want to discuss this possibility with the Allergist as well. Milk protein does increase mucus production (which can be a problem for people with Asthma), even in those without a milk allergy ~ cultured and cooked milk products don't increase mucus. Also, some find drinking celery juice (made fresh from raw celery; tastes great mixed with fresh juiced carrot or apple juice) or taking magnesium supplements helpful for Asthma symptoms.
I hope this helps - Take care,
Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD (Lupus?), Osteoporosis, Anemia, Lymphopenia, chronic malabsorption/malnutrition, Lyme Disease (Igenex Lab IgM WesternBlot positive/CDC negative), etc.; Currently TPN-dependent.
Meds: Pulmicort, Zofran, Vitamin B12 Shots, Heparin (to flush PICC line).