Have you taken any medication for dry cough earlier.? Did any other lab tests like for TB? Do send reports, consult online and get prescribed. You will be alright soon.

Eosinophilia Eosinophilia is defined as a peripheral blood eosinophil count > 500/μL usually due to an allergic reaction or a parasitic infection or sometimes drug reaction. SX - ask about recent travel (suggesting possible parasite exposure), allergies, medication use. PE - Rash (allergic, dermatologic, or vasculitic disorders), abnormal lung findings (asthma, lung infections, or syndromes of pulmonary infiltration with eosinophilia), and generalized lymphadenopathy or splenomegaly (myeloproliferative disorders or cancer).