I’m 20, I practice fencing. My height is 192 cm, I usually fence against shorter opponents. They often manage to drive their smallsword into my belly. That’s why I’m curious: what would it be like to get wounded into the belly by a real smallsword? How lethal would it be? How painful? How would I react?
Assuming it perforates the intestine - big infection from fecal matter getting into the abdominal cavity. It’s called peritonitis, and AFAIK it’s pretty much fatal if untreated. Severe abdominal pain as the infection spreads, all the vomiting and diarrhea cleans you out, and then the infection starts to shut your intestines and the rest of your organs fail while you go into sepsis and die. It’s not fast, either. It can take several days.