cardiac enzyme and 3 days

[colony5]

I'm a 37 year old male.  With no health problems except acid reflux.  I am 5'10" and 150 pounds. I dont smoke.   On Saturday 4-10-2010 around 2 am  I was in and out of sleeping and felt my chest get a little tight and some pain in the middle of my chest.  On Sunday 4-11-2010 I felt sore in my chest area.  On Monday I felt the same soreness in my chest area.  At 6 pm on Monday I went to the ER.  The ER doctor ran a chest x-ray on me, EKG, blood test, the doctor listened to my heart and lungs, and had me hooked to a heart monitor for 3 hours.  He told me my test came back good and sent me home. A week later I went to my family doctor and he said my test looked really good.  He listened to my heart and said it sounded really good and that I had no heart murmurs.  Will the blood test still be reliable after 3 days from my initial pain I had on Saturday 4-10-2010 at 2am?  Could I have had a heart attack and my cardiac enzymes went back to normal level because I waited 66 hours from the first pain I felt 0n 4-10-2010 at 2 am?  My chest is still sore but not as bad.
                                  Thank you so much for your help!      

[kenkeith]

"The cardiac troponins T and I which are released within 4–6 hours of an attack of MI and remain elevated for up to 2 weeks, have nearly complete tissue specificity and are now the preferred markers for asssessing myocardial damage. Heart-type fatty acid binding protein is another marker, used in some home test kits. Elevated troponins in the setting of chest pain may accurately predict a high likelihood of a myocardial infarction in the near future. New markers such as glycogen phosphorylase isoenzyme BB are under investigation.

The diagnosis of myocardial infarction requires two out of three components (history, ECG, and enzymes). When damage to the heart occurs, levels of cardiac markers rise over time, which is why blood tests for them are taken over a 24-hour period. Because these enzyme levels are not elevated immediately following a heart attack, patients presenting with chest pain are generally treated with the assumption that a myocardial infarction has occurred and then evaluated for a more precise diagnosis".