Francis, this sounds like PTSD (Post Traumatic Stess Disorder) due to the death of you son. I would immediatley consult a psychiatrist who can prescribe medication that will calm you and also talk to you about the fear that you have. It may of course, not be PTSD, but go to a doctor (not an md but a head doctor), it will help you to understand what is going on and will enable you to help yourself.
Good Luck.
IVE BEEN DOWN TO DOCTOR. HE KEEPS TELLING ME ITS BECAUSE OFF THE PAST EVENTS, I LOST MY SON WHO WAS ONLY 18YRS OLD TWO YEARS AGO. AND THEY THINK ITS THAT ,THAT IS CAUSING THE PANIC AND STRESS,, AS MY SON DIED SUDDENLY. SO I FEAR ABOT MY HEALTH AND MY OTHER CHILDRENS ALL THE TIME.. I CANT STOP THESE THOUGHTS. CAN ANYONE HELP ME?