I have also been drinking kefir every day, and I think it's one of the factors that has calmed down my gut. It's packed with probiotics, and can only help with maintaining healthy gut microbiome. I also switched to sheep yogurt mainly because the source is grass-fed, pastured animals that are not in a stockyard/feedlot and so do not have anti-biotics in their system.
What kind of kefir do you drink? Dietician told me much of it is high fodmap so I haven’t tried it. Doesn’t much of it have dairy and lactose in it? I am going to try making my own yogurt with lactose free milk in a pressure cooker. I think some milk is now supposed to be free of antibiotics too.