Thanks for writing your query.
After reading your post, it seems that you are having infection of the gastrointestinal tract and needs medical attention.
You can take an antacid like Omeprazole
40 mg once a day before meals along with Domperidone
10 mg for relief from your symptoms. Antibiotic like Ciprofloxacin
500 mg twice a day along with antiamoebic like Metronidazole
400 mg thrice daily will help in controlling infection. Probiotic along with digestive enzymes like pepsin and fungal diastase will have added beneficial effects.
Discuss with your doctor before starting any medicine.
Maintain your hydration. Increase thirst can be due to dehydration
You can take hydrating fluids.
Also take care of diet. You should avoid spicy/oily foods.
Eat food prepared under hygienic conditions.
If the problem persists, get yourself clinically examined.
I hope this is helpful to you.