Brief Answer:
Should go for some cardiac tests.

Detailed Answer:
Hello and thanks for choosing " Ask a Doctor" service for your query,
Have seen your details and I appreciate your concerns,
Two most likely causes of tightness or heaviness in upper abdomen are-
1)Gastritis or acid peptic disorder- You are on antacid already for 7 days and not relieved yet so chances are less likely.
2)Cardiac cause- It's not always pain. It can present as tightness heaviness etc in upper part of abdomen.
Two tests
1)Stress test- which shows any lack of blood supply to your heart.
2)2d echo - which shows motion of the walls of your heart should be done if you are not relieved by antacids.

Hope I was clear and easy to understand.
Follow ups are welcome,
Thank you.

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Brief Answer:
Follow up.

Detailed Answer:
Hello again,

The calcium score is not a specific test.
Tests that have high sensitivity and specificity should be done to remove confusion.

The test suggested are-
An ultrasound of the abdomen- Basic test to see any gross problem with abdomen.
2D echo at least to rule out heart.
Any other symptoms like bloating, belching, indigestion nausea loose stools unformed stools acid peptic disorder history GERD? Apart from just heaviness.

And the amount of relief you got on a scale of 0 to 10 after having medication for 7 days.
Please revert with these details.

Thanks

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Brief Answer:
Follow up

Detailed Answer:
Hi,
In that case proper cardiac evaluation should be done.
2D echo and stress test.

Thanks

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