Welcome to HCM
You are most likely suffering GIT infection Gastroenteritis
.It may be due to virus or sometime it is bacterial also ?Cholera.
You should go to ER and may require IV fluid as there is vomiting
and fluid and electrolyte loss will cause low blood pressure and if severe may affect your kidney function.
Treatment is prevention of dehydration .
A work up of Complete blood count
, Blood Urea, S. Creatinine
,Electrolytes and blood sugar is required along with Stool R&m and a hanging drop study to rule out Cholera.
Appropriate antibiotics and anti emetic and anti secretary drugs will help a lot and you will recover in few days.
Please use boiled and cooled water and ORS in the mean time.
Please take care