Hi,
Thanks for writing your query.
After reading your post, it seems that you might be having slight infection of the gastrointestinal tract.
You can take an antacid like
omeprazole 40 mg once a day, an antibiotic like
ciprofloxacin 500 mg twice daily along with
metronidazole 400 mg thrice daily after meals.
A probiotic and
digestive enzyme preparation will have added benefit.
You should record your temperature. If you are febrile, you can take
paracetamol 500 mg for fever. this will also help in treating mild back pain.
Also get yourself investigated for :-
1. Complete Blood Count(CBC).
2. Urine examination.
3. Stool examination.
Eat healthy and light foods devoid of spice, made under hygienic conditions.
I hope this is helpful to you.
Thanks.