I would recommend seeing an allergist and having an actual skin prick test done for environmental allergens. The blood test doesn't reveal as much information as a skin prick test. My daughter is allergic to mold and struggled with asthma until we got a handle on the mold allergy. When we first started treatment she was on two nasal antihistamines, singulair, and a couple inhalers when her asthma would flair up. Five years later, she no longer suffers the asthmatic reactions to mold. Find a really good allergist and hang in there. It gets better