Probiotics are a great help for a lot of babies with reflux! I would also highly recommend givine nat phos 6x a try! My daughter didn't have terrible reflux and thankfully wasn't a puker. She would spit up pretty regularly, and showed all of the classic signs of reflux for a while. She did much better on breast milk than she did on formula (and still does), but we had to supplement with formula early on to help her get back up to birth weight. That contributed to some supply issues, but that's another story.
DD didn't respond very well to the Zantac (ranitidine) and we quickly had her on the maximum dosage, which only seemed to help for a few days, then she would have several bad days in a row. I really didn't want to start the downward spiral of medicine with her so young (DH has acid reflux and is on medication that he can never quit taking, though now I'm thinking he should try nat phos as well!), so I started looking for a more natural approach. I copied a couple of links below with more information. The second one has dosage information, and let me tell you it worked!! The recommendation is to stop giving your baby medication when you start it, but I didn't want to cause any misery for everyone involved if things got worse. Now that she's better I'm going to wean her off the medicine gradually. They do warn that things can seem worse for the first 2 days, but then they get better. There is a liquid form of nat phos that is dairy-free if your baby has a dairy intolerance or allergy. There are other cell salts mentioned in the second link that help with other specific issues if you need them.
I hope this helps and you and your baby can get some relief!
https://www.mamanatural.com/natural-remedies-for-baby-reflux/
https://holisticsaffron.com/cured-babys-acid-reflux-7-days-natural-remedy/
P.S. I started taking the adult dosage myself to hopefully help make the milk she gets from me less acidic (not sure if this theory works, but I've had heartburn since being pregnant with her, so they help me out, too), and they taste sweet. DD has no issue taking them. I just dissolve them in a bit of water in the nipple of a bottle and let her drink it.