What is the experience of chewing gum to go to the toilet?

I have a stomachache when I smell smoke, and I will start to have a stomachache when I chew gum for a long time. Once I had a stomachache and went straight to the toilet. At that time, it was a public toilet on the side of the road. When I squatted in the toilet, my whole body smelled. I was playing with my mobile phone when I heard the voice of "grace" coming from next door. Imagine yourself, and then I realize I'm chewing gum. Is this vomiting or continuing to chew? I didn't really throw up, and I didn't stop throwing up.