What Could Constant Shivering /tingling Of Body Parts Suggest?

my symtom is i keep havin my leg or arm or hand all parts oif my body just jumpin my dr gave me beta blockers yesterday but this happpened before i was given them cause my heart feels like its gonna jump out of my body also i have started hallucinating well seein people that arnt there im worried sick because it sound crazy but its my legs etc an it only happens wen i try to relax or close my eyes please if you dont understand ask me to explain more im scared its bin like this for 3 days now an i do not take street drugs??