Hello, 5 days is a very short period to get diagnosed with IBS. Simple gastritis can lead to this. If you keep googling it will show it can be sign of cancer also.
So please relax.
Next Steps
bland diet for few days with plenty of yogurt.
antacids like pan 40 mg twice a day. 30 min before food for 5 days.
Health Tips
concentrate on ypur eating habits