Hi.
Thanks for your query.
Noted the history and understood your concerns.
All your symptoms including pain in abdomen as explained, smelly gas with feeling like going to defecation and too much urination are indicative of the following:
This looks like Colitis on the left side.
Frequent urination can be due to
urinary tract infection or so.
I would advise you the following in such a situation:
Get the stool test done on three consecutive days.
Tests of urine: routine, microscopy, culture and sensitivity.
Tests of blood.
Ultrasonography of the whole abdomen.
Clinical evaluation by your Doctor and correlation with the reports.
This will probably diagnosis and a plan of treatment which can be a course of
Metronidazole, antibiotics and probiotics.
If you do not get a complete relief, you may need further studies of contrast enhanced CT scan of abdomen and
colonoscopy for getting the correct diagnosis and further management.