Well had another surgery on Mon. They went all the way up into my kidney and still the stone is MIA...so I either a) passed it after the first surgery and didn't notice due to the pain I was experiencing from recovery, or it's under my ureter membrane-wall, in which case it won't cause any more problems.
So I am cautiously optimistic that all is well. But since it is still a big Question Mark, I can't have certainty that this horrid little bugger is truly gone.
I will go in next week for stent removal and CT scan to see if it's still in there.