Are you noticing the symptoms getting worse over time, or better? You might want to lay off the gym until you feel better. You have certainly put a strain on your heart, so let it recover. One thing that has been shown to help repair heart damage and prevent further damage is hawthorne extract. Avoid any stimulants, including caffeine. If you notice the symptoms getting worse, definitely 100% go to the doctor. But if it gets better, even slowly, I think you should just ride it out, and take care of yourself, considering what you have to lose.