Im suffering with severe shortness in breathing doctor told me I am suffering with GERD cant bear this plz help me sir

This problem I am facing fir past 8months it’s irritating it’s troubling lot . I am getting shortness in breathing can’t able to eat drink concentrate in any work .like something compressing my heart and lungs its not able to expand even if I try exhale and inhale through mouth cant able to breath . Help me for complete cure plz it’s really dying everyday …