Get some bloodwoork done and you may have low vitamin D3. & w kidney stones. Family dr or an endochronologist can tell ya . I have same pain bad and that's what mine was.I have 1 left they did CT at ER last night. It started w/5 or 6 stones 2 weeks ago. Good luck if it's on right side near your liver. Check out gall bladder it can develop stone too. Those can also be very painful while passing good luck to you.