My 2 year old has a nagging cough lasting 4 months. She as also not been herself, very cranky, and sometimes red around the eyes and clear nasal discharge. I know nothing about allergies but my sis in law told me today that allergies run rampant on my hubby's side. Our pediatrician wants to put her on antibiotics or allergy meds. Should I take her to a specialist? Should I invest in an air purifier? Our house gets very dusty, but luckily is all tile with the exception of the bedrooms..