Hmm have i got a anxiety disorder ?

My dad suffers from Generalised anxiety disorder (GAD) , i am worried that i have got the same thing ! i am a compulsive worrier ! everything i do i worry about i even worry about something so ridiculous like changing my top in case i get bad luck , i am starting a new school tomorrow ! i am stressing about the most silly things again! also when me and my family go out like to the local supermarket i get flustered i feel like i'm chocking , my palms sweat and i start to feel faint why am i doing this i just don't understand i need some answers!