My 5 years old daughter was really healthy, until she get into pre-k and received her vaccines needed to comply with school requeriments. She s being having colds very often, with fever, cough with phlegm, we take her to her peditriacion who told me that is likely caused because she started pre-k and the contact con several kids can cause those frecuent colds....or that could be an alergy and that we can start giving her allegra or any other alergy product. Is this an accurate diagnosis? She didn t order any lab work