I would definitley stay away from gripe water, just in case it is reflux. This is why:
one of the main ingredients in gripe water is sodium bicarbonate (baking soda), which is a natural antacid. Unfortunately, on its own sodium bicarb is not a very good antacid, which is why it is not sold as such. The reason for this is that, while it very effectively neutralizes stomach acid, it also activates or "turns on" the acid producing proton pumps in the stomach lining, causing them to produce even more acid. Magnesium hydroxide and calcium carbonate are more often used as antacids because they neutralize acid without turning on the proton pumps.
Because gripe water contains sodium bicarbonate, which can actually cause more acid to be produced, it often provides temporary relief from the symptoms of reflux, but then causes it to come back even worse than before.