Melanoma troubles please help!?

hello. today i went to the dermatologist and while he was examining my moles, he also looked at my dad. everything was fine with him accept the doctor found a blackish little mole on the top of my dads right ear. He said that he would have to remove it in a couple of months. He also said a guy he saw earlier had a similar thing and it turned out that guy had melanoma. the doc said that it is probably nothing but it could, could, be melanoma. It is relatively very small and the doc said it was a little tiny bit abnormal. we just got back from turks and caicos. I am afraid that my dad might have melanoma. If he does what happens. im paranoid right now and im so scared. help. could it already have spread? should i be afraid? please help