J had reflux and we tried several ways and I am going to share with you what we found that worked.
1. The Pediatrition gave us liquid Reglan. He took .9mg??? It was a very skinny syringe that went to 1.0 and his dose was almost to the top. It smelled like oranges and he would just lick it up. We gave it to him a few minutes before every bottle. Reglan relaxes the stomach muscles and this allows the food to pass on through more quickly. Other drugs for Reflux can work on the acid producer glands in the stomach, so different meds work on different issues. Talk to your doctor aobut this option for your baby. The X-Ray test showed the reflux very well in J. He burped up stuff during the test....
2. We added Mylacon Gas Drops to every empty bottle, then added the nursery water, then we added the nipple, ring, and put a lid on it and kept them in the diaper bad. When he got hungry we added the formula powder and the med was already mixed up so we didn't have to shake the bottle more than necc. adding even more air bubbles.
3. You know those seats that are called bouncy seats? They slightly recline and have straps that go across the crotch area and when the baby kicks or moves the seat moves up and down. You can sit them on the counter tops, on the floor, dinner table, etc...we put one in J's bed and he slept in it until her was really fussing at night. IE: wanting to roll around, sleep on his tummy, etc...by the time he gets old enough to really start disliking sleeping in the chair he should be growing out of this.
Here's a link to a picture just to make sure I am not confused and saying this wrong.
http://www.parents.com/baby/gear/registries-buying-guides...
Anyway, even at the child care center we made sure they knew the bottles of water had medicine in them and that was why they looked slightly milky. They thought, at first, the bottles hadn't been washed well and old milk was still in them.
They do grow out of it. Eventually!...LOL. It sounds like you are doing everything you can, especially if you add a medication.