Wellness is not a product, but a process. In your case it boils down to picking up habits that prevent dust mites from thriving and pooping in your room ("dust" allergy is actually "dust mite poop" allergy).

• Procure anallergic syntetic bedding (at least the pillow)
• Change the pillow cover very often and the sheets often
• Air the room daily
• Clean the floor and surfaces twice per week (not before going to bed) possibly using a vacuum with HEPA filter (Mieles are good). Service the HEPA filter according to instructions.
• Expose duvet/covers to the sun when changing bedding
• Get the fans out of the room or at least far from the floor
• Experiment with less gluten, meat and diary products, as allergies tend to stack up and exacerbate each other