Breastfed baby with reflux issues... what’s your advice?

So June is almost 6 weeks old and she’s been having reflux issues for a while. She’s breastfed, pretty much exclusively. I can count on one hand how many times she’s had a bottle. When I talked to my doctor she asked if I’d be willing to try oatmeal in her breastmilk, but I wanted to try not to add anything to it, so she gave us some Zantac. That seems to have helped initially, but now she’s back to spitting up after every feeding again. What do some of you mamas say?