Kidney Stones

My daughter was diagnosed with having kidney stones. She was in extreme pain, vomiting on and off for almost 2 weeks. They did a x-ray and found out she had 2 kidney stones. They told me they were in the kidney and should pass within a couple days. It has been a week, and she was on pain meds the first 2 days, then we took her off. She hasn't had anymore extreme pain since before the x-ray that diagnosed the 2 stones. The doctor seems to think they've passed, however advised me she would have the extreme pain again when they passed. I have read they can sit dormant for awhile before passing. She still has blood in her urine when tested. We follow up in a couple weeks with the Dr. I guess I just want to know what are the odds of her having this extreme pain, while they were in the kidney, and yet no pain while they pass? Could they still be in her, and we'll know when they pass, due to her at some point being in extreme pain?!?! The not knowing is the hard part. She is only 10 yrs old, and we don't have a family history of kidney stones. Thanks for any replies......