Welcome to our group!! I know that you don't want to be here, none of us do, but it is a great place for knowledge and support. There is a lot of information on this web site and, IMHO, it is the best, most reliable, and complete of any on the internet.
From what you said, I assume that your diagnosis is papillary transitional cell carcinoma. That is where a lot of us started; many of us have moved "up" to other diagnoses. Usually, for this the initial treatment is what you had...a biopsy and removal of the tumor. BCG is usually used when it keeps recurring...multiple times...or if you have CIS "carcinoma in situ."
Since he took a biopsy sample and removed the tumor there was injury to your bladder. It may take a week or so to heal before the blood specks disappear.
Again, I urge you to read all the background material on this web site. After that, there are lots of really knowledgeable people on this list to answer your questions and offer support.
I showed up here, like you, in January. What a long time ago that seems!
Sara Anne