Possibly, though I really hope not, if its Gallbladder, they will need to remove it, and if they do, there are problems after losing a Gallbladder I would rather not have.
I've had kidney stones twice before, and this feels similar, but there are key distinctions, whenever I have had kidney stones no painkiller under the sun made any difference, I once choked down 300mg (not 30, 300) of dihydrocodone in under 6 hours because I had to do an 20 hour shift or loose my job (my boss was a dick) and I was desperate, but no effect whatsoever, I may as well have been eating M&Ms, and one time I was taken away in an ambulance from the pain, they gave me morphine into he vein, nothing, but this one does often respond to a mix of codeine, paracetamol, ibuprofen and caffeine (doctors refuse to prescribe any pain meds so I got creative), there are also differences in how the pain comes and goes, Kidney stones when the pain stops it was always sudden, like someone flipped the pain switch off, this one tapers off gradually over hours, also unlike kidney stones a single period of pain can last days, kidney stones only lasted a max of 15 hours at a time, the list of differences goes on but all in all, Im pretty convinced its not kidney stones.