An embarrassing experience---Draft 2

A very embarrassing experience happened when I was at nineth grade.

In junior high school, because we would have a big exam for entering
a higher school, we had to stay at school to study until 9:00 p.m.

One day, I felt stomach upset when everyone in my classroom were
studying quietly at about 8 o'clock p.m. And a few minutes later, I wanted
to fart. I tried to forbear to fart. But it's too late, I farted. It was loudly.
And the worst was that there was a boy sat next to me.
I felt very embarrassed and my face turned very red quickly.

I think nobody could be more embarrassed than me!