I am 13, and I a man starting secondary school (high school etc.) and it's all about to completely change and I am extremely nervous and I feel my legs go jelly when I think about it and I start to sweat sometimes but my mam said it's normal to be nervous but then my head started getting itchy and it's cut from me scratching it, my doctor said it could be my body reactions to stress but idk what to do, he said relax but I don't want to because then I feel like crying and I think I need help???