When In Shock Even From Minor Things, I Panic So

When in shock even from minor things, I panic so much that I can't do anything. I become sweaty and I can almost feel blood filling my head. I have tried to control that so many times but nothing seems to change. I really need help. Also in my normal state my hands can barely hold something without dropping it. People call me clumsy but it's something I can't control. I am always careful picking items but something happens the moment I do... I am very bright but very forgetful about small things... I understand fast and some of my friends call me the witty G. However there is something about me that I can't comprehend