Hi I did cocaine years ago and one time after doing it all weekend I had chest pain, I went to the doctor and he said I had swelling around my ribs caused from cocaine, I quit the cocaine and have not touched it since, and for 18 months every now and then I will get this electric shock, lightening bolt feeling through the left side of my chest and a discomfort in my arm, It happens maybe once a week and it's not painful, what is it please