Hi,
I can understand your concern.
After going through your question there is possibility of stomach and intestinal infection (bacterial or viral) which is responsible for
diarrhoea,
nausea, abdominal cramps.
I will advise you
1) Take plenty of water with electrolytes to maintain adequate hydration.
2) Keep taking liquid to
soft diet like banana, curd rise.
4) Avoid spicy, oily food
5) Symptomatic treatment like antacids, antiemetics, antispasmodic may help in relieving nausea, heart burn, abdominal cramps .
6) If loose motions are severe there may be need for antibiotics after consultation with your doctor.
Depending up on your clinical examination and severity of symptoms there may be need for blood tests like CBC,
Kidney & Liver function test, urine, stool examination and if required
ultrasound of abdomen.
Hope this may help you, if so do vote.