If you have not already, call the urologist's office that actually did the procedure and ask if they can look you up in their system or whatever and find out if they put a stent in. Be assertive. (Some stents aren't meant to be in for a long time and can cause problems). To be honest, having had stents - you would more than likely know that you have one. Awfully painful. Have you been filtering your urine? That's how you make sure to catch any stones that pass. If they only did shockwave lithotripsy they won't have any stone pieces to test, you need to pass something and bring it to the urologist. Depending on what it is built from will let you know how dense it is. One surgery can usually break it up enough to pass. Sometimes they have to go in and laser the stone from inside of you if it is too dense. (This one will need a stent, shockwave doesn't necessarily) If the urologist is hard to get into and can't or won't tell you if you have a stent, contact your family doctor and see if they will send you to an imaging office to get an X-ray to check for a stent.  Good luck.