What you describe certainly sounds like a Urinary Tract infection of some sort. Breast cancer metastisis usually involves bone, lung, liver, brain and rarely colon. I personally have never heard of the bladder being affected. Did you see a Urologist ?? If not, I would advise you to do so.
I agree with you that it does sound like a bladder or urinary tract infection but I just had it checked and it was clear. I am actually on cipro for a sinus infection. I have heard of one case where breast cancer had spread to bladder but I wanted to hear if more cases had occured. I am checking with urologist tomorrow. It is just strange that I have pain and infection symptoms 24/7 even when I don't have an infection. I knew the breast cancer spreads to brain, liver lung bone and all. I have even heard of a case where it spread to kidneys and stomach. Personaly, cancer is cancer and lymph nodes are lymph nodes. I don't trust either one of them.