well i recommend you get this checked out. heart problems can hit like lightning (heart attack) or come on gradually. it sounds like you may have a heart problem that's becoming gradually worse. of course this can only be determined with a physical examination and some other testing performed by your health care provider. chest pain that lasts 8 hours is nothing to ignore. please get medical attention as soon as you can. all the best to you!
chest neck arm pain began 2or3 years ago aft heavy work. lasting 30 mins. now any activity even showerlasts 8hrsor more