If you cut out dairy while breastfeeding, what made you decide to do it? What, if any, symptoms did your LO have? How long before you noticed if it helped or not?

My 4 week old was diagnosed a week ago with reflux and is up most of the night moaning & groaning, but not crying. Zantac doesn't seem to be doing anything. Aside from the reflux and a few curious-looking diapers (speckled with brown/black streaks) I haven't seen any other food sensitivity symptoms, but I'm going dairy-free all the same to see if it helps. Curious to learn from others' experiences!