@Glynnis that sounds awful! Pus in your kidney. Did they say what caused the pus? The stents getting infected? I had mine last done in November and due again in May/June. No problem with the last change as I started antibiotics a few days before and they gave me some via iv while doing the changeover. Such a relief after the terrible infections and illness from the first few changes. Oncologist decided yesterday that the Palbo is just not working and my tumour markers are rising markedly. The Kisqali worked well, but caused problems with the heart, thus the change to Palbociclib. The alternative now is to go onto a trial of a new drug they are trialling. All to be sorted in the next couple of weeks. Hope you get over this hiccup quickly and recover fully and keep going strong! :)