Hello ma'am.
According to the information given by you, it means thet the stomach is above the left diaphragm which can point towards diagnosis of Congenital Diaphragmatic Hernia.
It is a problem which abdominal viscera(organs) protude into chest cavity due to failure of closure of pleuro peritoneal canal.
It can lead to respiratory and cardiac problems in baby.
Hope this helps.
Regards
Dr. Kshitij Singh
Next Steps
Consult a Gynaecologist and a pediatrician.