I was tested for kidney stone. Dr. Said nothing came up in urine test. Is that defiinte?

Not at all.. Acute kidney stone as it is passing down can cause some bleeding, thus urine testing for presence of blood and not stone. Many diseases cause blood in urine--bladder or kidney infection, tumors etc...So blood in urine does not necessarily mean stone. A spiral ct is an excellent test these days and can help detect where and how big the stone is. Consult your doc. Good luck.