Exam causing digestion issue ibs

Age-23

Gender-Male

Height-6'2

Weight-55 kg

Exam stress causing digestive issues (IBS-like symptoms).

I'm dealing with a frustrating problem that's affecting my exam preparation.

A day before an exam, or sometimes on the day of the exam itself, my stomach starts acting up. I get excessive gas, bloating, diarrhea, and IBS-like symptoms. The anxiety seems to trigger it, and it makes it really difficult to focus on studying or even sit through the exam comfortably.

The strange part is that I don't have any stomach issues otherwise. I've already consulted a doctor, had an ultrasound (sonography), blood tests, and other routine tests done, and everything came back normal.

I had a random sugar test too it was also normal.

The doctor suggested that I take O2 and pantop for diarrhea and gas for 5 days when I visited him.

It was 4 months ago.

Any advice on reducing stress-related digestive symptoms before exams would be greatly appreciated.