Will cholera kill me if I don't get treatment?

Can do. Very serious illness. Needs IV fluid replacement therapy plus antibiotics.
Not necessarily. Most people are asymptomatic. 5 to 10% have more severe illness. Possible symptoms/ signs of thirst, abdominal pain, watery gray- cloudy diarrhea, nausea, vomiting, leg cramps,rapid heart rate & breathing, lethargy, dehydration, electrolyte imbalances, seizures, coma or death. Hydration (oral or IV) is primary treatment - Antibiotics can shorten course of illness.