Wait to see if it gives you trouble, or wait and see if doing something can get rid of it? I don't know much about gall stones, but I know it's rough and can make you pretty sick. My brother in law had one removed a couple of years ago, but I didn't hear what the issues were other than hurting a good bit and making him sick.
IMO, cheat "days" are just too much, but nothing wrong with a reasonable cheat "meal". That can even fit in your macros for your diet plan.
Salty fried stuff...yeah probably best avoided. Not easy to do that down here is it?. LOL