Can Gallbladder Or A Heart Block Cause Chest Discomfort With Mild Spasms?

Hi; i am scheduled for a stress test on 7/11 by my cardiologist after my ekg and echo were deemed ok, as i had a aortic heart valve replaced about 8 yrs.ago with a bovine valve. for ther last six weeks i have had chest discomfort around the area of my breastbone incision, and have had some previous gall bladder tests years ago when i would have similar symtoms, but not as long in duratuion as recently. sometimes my current symptoms are relived by antacids. can heart blockage be a possibility, lasting for weeks with these mild, spasms ; or possibly a gallbladder attack ?. i am 71 years old, and diabetic . my blood pressure and glucose readings are in line. would just like an educated opinion at this point. thanks