Never heard that swollen feet are a symptom of bladder cancer. The internet and TV are a wealth of info and a lot is bogus, false or misleading. Heck, you watch ads on tv for prescription meds and after all of the "potential" side effects I am not sure ANYONE would take ANYTHING. Stick with your professional team....yes they can be off sometimes also that is why I encourage people to listen to their bodies and give them as much information as you can....including swollen feet.
Has a cystoscopy been done? That combined with your scheduled CT scan are the 2 more definitive tests. Until then you know nothing. IF, and only IF those 2 require further follow up, usually a TURB (transurethral resection of the bladder) and will be a minor surgery done as day surgery and only then after a biopsy will you really know what you may face. If the 2 tests show nothing they may do a few others BUT, some never ever find the cause of hematuria.