Hello and welcome to HCM,
You have a perfectly normal
blood test reports, nothing to worry about.
As for the
dust allergy, the only thing I would advise is precaution.
Stay away from dust as much as you can, dont do dusting, cover your nostrils while driving or on an occassion of exposure to dust.
As for skin, my first advise would be to moisturize a lot. That would get you rid of dry skin as well as relieve the itching. Buy a rich moisturizing lotion and apply daily twice on damp skin for better absorption.
Take oral anti allergics like cetrizine or
loratadine for instant relief from the allergic symptoms.
Some people get relief from generalized
urticaria by a procedure called AST (autologous serum transplant), consult your
dermatologist and take an opinion.
Hope I helped. Feel free to followup in case of doubt.