Talk to your doctor and tell him how you feel.
I've been getting chest discomfort
for a few months now,I had an ECG,the stress
test(treadmill) and an Echo-cardiogram.They were all normal apart from a question mark on my stress test.I was told it could be angina
but it wasn't conclusive but I was put on blood pressure tablets and aspirin
and have a nitro spray. My doctor has arranged a Cardiac Catheterisation(angiogram), a dye is put into the heart and shows up any problems.
He feels we should know once and for all if it's a heart problem.Stressing about it can make it worse but you need to find out the cause.