How to deal with a 3 week old possibly with acid reflux?

Babies do have reflux with just milk...my child also has reflux. She had it will milk so I made the decision to try formula, still spit up, tried soy, still spit up, tried rs sensitive, still is spitting up. right now she is on zantac....not really working. Good luck! Invest in a lot of bips, burp rags and carpet/furniture cleaner lol