hi, i m dr. fahmida, mbbs,fcps medicine.my mom 54 yrs old had to go to toilet several times a day for last 2 weeks.initially it was waterry, but now loose.she had stool and urinary incontinence. on physical exam, she has no abnormality other than oral ulcer. she is obese, hypertensive but non diabetic.all routine inv including cbc,RBS,RFT, electrolyte, urine R/M/E normal. stool R/M/E-color-brown, consistency -soft, blood - no, mucus-trace, ph-acidic, worm-no, pus cell 1-5, rbc,protozoa, helminth,macrophage-nil, vegetable cells-moderate, OBT-negative.she was previously diagnosed as IBS and treated with rifaximine, mebeverine, amitryptine but not improved.would u pls diagnose her disease and give treatment?