Not likely on the pain killers. It's transient pain rather than permanent, even if it is bad.

I've had two kidney stones myself, the most recent of which was last month. They always tell me the same thing. Move around as much as possible instead of staying still. The movement helps them pass better than staying still does. Drink a lot of water. Wait for them to pass through. If it's big enough that it's causing pain, you know exactly when it leaves your body because you can feel it every inch of the way until it does, and you can usually see it in the toilet afterwards (they're fairly small). You can feel it in your entire urinary tract as it moves through, and the sensation changes as it progresses.

Give up on the antacids for the reflux and take Pepcid AC or Prilosec or something better than the calcium-based stuff. They counteract acid production better anyway by blocking its formation instead of treating it once it's already there. They told me iced tea (which I love), spinach, strawberries and chocolate are all kidney-stone-o-genic foods. All of those are things I'd have daily if given the chance. Drink a ton of water, too. That helps to prevent them from forming.