A I've had chest pains off and on for two
Please refer to the detailed answer below
After going through the medical details provided by you I can understand your concern for your health and I would like to tell you that with history of CAD and the current symptoms which you are experiencing you should seek urgent medical attention.
It’s highly advisable that you should visit an ER asap.
The gastric upset could be because of ongoing cardiac medications like aspirin. So kindly consult your treating doctor or visit ER without wasting time.
I hope this information will guide you properly.
Dr Bhanu Partap