Oh so sorry! But knowing that the fabric can be washed and the allergen removed should give you a sigh of relief.
I agree, have someone else wash the fabrics for you so you don't have to touch them or breathe in the formaldehyde ... maybe invite a few friends over for tea/coffee/lunch/desert and some laundering /ironing of your fabrics. What are friends for? I think it would be fun myself and would come over and help if you were local to me.
warm quilt hugs, sue in CA