MANHASSET - Just as spring on Long Island seems to have arrived early this year, so too has allergy season, doctors say.The unusually mild weather has flowers blooming and trees budding early, and many local allergy sufferers have already started sneezing and wheezing.Doctors are warning that the early allergy season may overlap with the traditional flu season this year. They're advising those prone to allergies that some allergy symptoms can closely resemble flu symptoms.Find out what's in store weather-wise for next week: News 12 LI Weather Center