I'm not scared of airplanes im scared of aiports!

I'm going to Greece tomorrow and i'm not worried about the flight there, I mean it's only three hours. But i'm so scared of getting stopped by security! I don't know which one of my belongings contain metal or not and if that alarm beeps i'm literally gonna have a heart attack. Also I don't want the security to check my laptop, i'm gonna bring it with me to watch a show or play some games on the plane ride but I really hope security doesn't check the content on it. I'd die of embarrassment. And imagine if we accidentally go to the wrong gate! Then everything would be ruined! I know it's probably gonna be okay but i'm still so worried!