Any probiotic supplement required?

Hi, I'm a nursing mother and my son is 18 months old. For the past 8 months I have had frequent loose motions especially when I travel or when I dont sleep, after eating mutton / fish at times. I have never had digestion issue before delivery which bothered me a lot. I consulted a gastro doctor and did colonoscopy last month and everything is normal in my colon. No inflammation, ulcer or polyps. It was clean. After that doctor prescribed me anti diarrhoeal and probiotic for 15 days. It's been a month now but I still get mild cramps and loose stool (not diarrhea) when i eat fatty foods and also passing lot of gas than before colonoscopy. My periods are irregular still and I have noticed loose stool before and during periods also. Gal bladder, kidney, uterus and everything is normal in abdomen usg. Can I please know if I need to take any probiotic/ supplement on long term or any home remedy that helps? Please advise.