I've had upper abdominal pain & shortness of breath for 7 days. doctor did ecg & bloodwork (normal) so they think it's stomach ulcer. taken pantoprazole for 5 days, no improvement. pain does not get worse when eating acidic foods. what could it be?

Would get tested for H pylori a bacteria that resides in the stomach and is associated with ulcers and needs antibiotics to resolve/or gallbladder( ultrasound). Test for COVID. Do CXR.. Recent vaccination- check for myocarditis (may see on EKG/echo) Rarely if near the lungs may be lung clot (more commonly in females on birth control) -d-dimer test may be helpful. F/u/ w/ urgent care/ MD