This is scary, for a doctor to push meds onto a baby!
Okay, think alternative now. You've tried conventional and are not happy. So think outside the box now. Mint has a soothing, calming effect on indigestion. So does ginger (like with gingerale? you drink it when you have stomach flu to calm things) Those are two things you could try.
Next, find someone in the alternative world of health who knows how to adjust stomachs. Yes, adjust. Like getting a chiropractic adjustment, sometimes the stomach gets a little out of place and has to be "put back in place" by manual manipulation. I can attest to the fact that for over 3 decades I was constantly having dinner over and over, unless I used some sort of mint (gum, toothpaste, whatever!) to make it stop. When I got my stomach manipulated for the first time, the difference was unbelievable. Spaghetti was the worst offender and I had some that night without any repurcussions. Difference between night and day. I can offer a phone number to the lady who occasionally manipulates my stomach. But left undone is what causes reflux. It's called a hiatel hernia. And ultimately you can learn to do it yourself.
Let me know.