We are sorry to hear you are experiencing this. It's advised that you give your doctor a call to report this now even with your upcoming appointment in a week. They may wish to evaluate you sooner under these circumstances. Some bleeding, however, is normal after this surgery and cath removal. https://www.cancer.org/cancer/bladder-cancer/treating/surgery.html
Please stay in touch and let us know how your appointment goes and the doctors thoughts on this bleeding.