Hi, as you are diagnosed as the case of renal stones. you may have passed the stone and simply not noticed it in your urine, it is important to know that there are times that your pain might completely resolve, even though the stone is still blocking your kidney. It is critical that you follow up with a urologist to prevent these silent stones from permanently injuring your kidney. There are several situations in which immediate evaluation is recommended, even if your pain is mild. These include: fever with chills, urinary obstruction, severe vomiting, fatigue, confusion etc...,

hello. could be a stone but smaller size, but the exact cause of the pain can be said only if you say the exact site and type of pain. suggest you to drink lots of water, maintain good hydration. visit a surgeon if problem persists. regards