Originally Posted by
Carbonfiberboy
Why do you think it's angina? Many people mistake heartburn for angina (among them my mother). That's a simpler explanation for the different effects of position. You could experiment with omeprazole (OTC), see if that made a difference.
Once my angina got worse and got mild heart attack and rushed to the hospital. Classic symptoms like radiating pain on the shoulder, neck, and shortness of breath.