Bretrick, If you're willing to die without treatment it's your business. I do want to tell you though if you were having a major coronary event and lived--you could be left in really bad condition, even to the point of not being able to live on your own. That is one possibility. Another possibility if you did survive you may not be able to get some other medical procedures, repair of a hernia for example, because of your cardiac history.
Aligatorob's post about the symptoms is quite good. I'm speaking from personal experience. I'm a member of the zipper club (bypass x3) and my heart attack was serious enough to get me into the OR first thing next day. That means I bumped someone else scheduled for it. The pain I had was discomfort in the breast, left arm, and jaw. I also had nausea, cold sweats, and an overall feeling of being unwell. What I was doing and where I was having cold sweats could have been due to how I was dressed, air temp, and my physical exertion. Time between first onset of symptoms to deciding I needed to go to the ER was a bit over2 hours. That wasn't all just my deciding if I needed to, but I won't go into that now. If you'd like to know I'd do another post.
I had a friend that had lung clot pain and he went to the ER because he was just home from a stay in hospital for having 3 heart attacks in 90 min. He wasn't sure of the nature of the pain, it didn't feel that different. He did need to be hospitalized for 3 or 4 days.
I assume any hospital you go to adheres to triage principles. Doesn't mean you'd get right in, you are head of the line.
I would urge you to get it checked out. It's not just your life on the line. You can die on the spot doing anything, like your job, driving a car, cooking dinner. Doing something that your death can cause injury or death to others. Not to mention it could be something else much much less serious, but painful none the less. I wish the best for you.