A Huntington Station mom is pleading for help in the search for her missing son.Ian McGillaway, 33, of Williston Park, has been missing for two weeks. His car was found last week at the Planting Fields Arboretum in Oyster Bay.His mother says he suffers from bipolar disorder and doesn't have his medication with him. She says the father of two recently lost his job and has been depressed. McGillaway's mom says she hopes the explanation for the disappearance is that he is manic.Police are asking anyone that might have seen him to call 516-573-7347.