need help please

Hi- i was taking high potency probiotics for 4 months for my intestinal health. I may have SIBO and/or colonic dysbiosis. After 4 months my lower GI improved dramatically but i also started developing really bad acid reflux with the probiotics i was using. i was taking about 600 billion CFUs per day (mostly bifido strains). so i had to cut back on the dose and take one day off and one day on. my reflux then improved but then my lower GI got out of whack. anyone know what this could be? thanks Tweet