I was in the emergency room 2 days ago in great pain - lower right back, plus difficulty urinating and pressure in bladder area, plus waves of nausea. They diagnosed a small kidney stone through a CT scan. They have me a strainer to catch it, and said its ejection is imminent. The problem is, it's been over two days, and it hasn't come out. The pain is completely gone. All I see the the strainer are what look like tiny soft black pieces of fabric. Nothing solid. What should I do at this stage?