I've been smoking for a few years, and I've recently started feeling this mild pain in my heart, especially when I'm lying down. I'm pretty sure it's connected because I've been smoking more than usual this week. Do you think this is just a temporary thing, or could there be a more serious condition going on? Also, should I be getting any specific tests done, like a cancer screening or something? I really want to quit smoking, but I can't handle gums, and patches just don't seem to work for me. What should my next steps be?