Hello and welcome. Hopefully you have worked with your doctor on this situation. An obstruction and issues passing a stone can possibly lead to fatigue. Other things can as well. Do you have ongoing kidney stone issues?
Here is an older post with one of our doctors weighing in on fatigue and kidney stones. https://www.medhelp.org/posts/Urology/Kidney-Stones-and-fatigue/show/226608
Here is some information on kidney stones in general https://www.webmd.com/kidney-stones/understanding-kidney-stones-basics#1.
Do you receive treatment for the stones?