Hi Buffy, My baby was also treated for an UTI only to have the symptoms return.I put off having an ultrasound done as well, figuring it wouldn't change anything. But after days of wondering is it TCC ? or hoping it was not I finally went ahead with it. Although hearing that it WAS tcc was difficult at least I am no longer in denial. There is also a urine test - VBTA (has anyone else heard of this test?)- that can be done. My vet was not too keen on it as there can be false positive results but he ran it anyway to pacify me. If it had come back negative I probably would have stopped there and waited, but it did come back positive so that was when I had the ultrasound done. Yes it can run into quite a bit of money, but like Cathleen said if your Vet won't work with you maybe you can call around and find a Vet that will.
Karen