in the last month i have had sharp chest pains,sometimes its intermitant and it often feels like aheavy pressure on my chest.along with the chest pains ,headaches,stomache,and a sometimes back pain.i am 70 years old weight 270 lbs.6ft,2inch.i have 2 ekgs,chest x-ray and a cat scan that reveals nothing.my doctor says i have acid reflux and gave ranitidine for me to take but it does not help.any ideas?