Can you help me what is going on with me?

Lately there has been alot of deaths from car accidents and drunk driving sense then I can't stop thinking about death. It scares me I have had panic attacks my mind is constantly wandering 24/7 this has been going on for a month my left arm is constant numb and has muscle cramps and lately I have been tired all the time. This is taking over my life I'm only 18 what is going on with me I just want to be back to normal.