So when I get nervous I feel like my vision somewhat tunnels, my heart beats faster, my breath rate is higher, and then i notice that i can see my nose, my eyelashes (mind the fact i have a huge nose and fabulously long lashes), and my eyelids, then all movements from people around me are amplified, sounds sometimes seem much louder and selective. So like if I hear something loud behind me its all i can hear. This didnt start til I developed GAD