Thanks for writing your query.
It seems that you are suffering from infection of the gastrointestinal tract.
You should get yourself examined at the Emergency Department for your hydration and other vitals like blood pressure , pulse ,etc. and start treatment as needed.
Get your stool examined. This will help to know the kind of organism causing the infection.
You should take antibiotic, antiamoebic and antacid
along with probiotic
after getting yourself examined. Antispasmodic will help to relieve stomach pains.
Take care of your hydration. If feeling dehydrated, you should take oral rehydration fluids. Make your diet light and less spicy and less oily. Drink pure filtered water only.
I hope this is helpful to you.