Hi, Thanks for writing in. A 14 mm stone is fragmented into small parts after lithotripsy. A double J stent is usually put during the procedure to allow the small fragments to come out. After 3 days you might find few grains of crushed stones in your urine and this can cause slight pain in the process of expulsion. It will not be continuous and at times can only be a fragment or two. If you are on medications like alpha blockers which cause smooth muscle contractions and forward movement of the stone fragments then it is possible for the pain to be less and more fragments to be expelled earlier. Recovery from surgery can take time as you had sepsis and infection of kidney, however you should be normal in 4 to 6 weeks.