Thanks for your question on Health Care Magic.
I can understand your situation and problem.
Sudden onset coughing, breathlessness and
abdominal pain are seen in
1. Lung conditions like pneumothorax, severe bronchospasm,
Pulmonary embolism etc.
2. Abdominal conditions like severe gastritis, gastric perforation,
intestinal obstruction etc.
So
consult doctor and get done
1. Chest x ray(for pneumothorax), PFT (Pulmonary Function Test) (for bronchospasm) and if needed CT
Pulmonary Angiography (for Pulmonary embolism).
2. X ray abdomen standing and ultrasound examination of abdomen.
All these conditions need urgent treatment. So better to first diagnose yourself and then start appropriate treatment.
Hope I have solved your query.
Wish you good health. Thanks.