Thanks for writing your query.
After reading your post, it seems that you might be having colitis and needs medical management.
I would advise that you should get yourself clinically examined and investigated by a medical professional.
Following investigations may be helpful :-
1. Complete Blood Count
( CBC ).
2. Liver Function Test ( LFT ).
3. Stool examination.
You can take an antacid like Omeprazole 40mg once a day before meals along with an antibiotic like Ciprofloxacin
500mg twice daily and antiamoebic like Metronidazole
400 mg thrice daily for 5-7 days.
A probiotic for long duration will have an added beneficial effect. Digestive enzyme
preparation containing pepsin and fungal diastase after meals will also help in the process of digestion.
I hope this is helpful to you.