Holy Crimeny!!!
Glad you got to the ER!!!!
Good news that it was not bladder cancer so you don't need to worry about that anymore. The remaining fluid in your body will reabsorb on its own without problem but do not stop those antibiotics until you are told to (after you have completed all the course). You'd be surprised how many people have unwittingly created antibiotic resistant diseases because they don't finish all the antibiotics as instructed.
The pain will go away now that they have things under control. I'm guessing it's a pretty tiny hole in the bladder or they would be going in to sew it up.
What a nightmare! However, I'm guessing the weight of the world was lifted from your shoulders now that you found out you do NOT have cancer!!!
No celebrating (except in your head) until you are better from this other catastrophe though!
I would also recommend a new urologist if you have problems in the future. They should NOT be making holes in your bladder for TURBT and they especially shouldn't have been ignoring your post-operative problems.
Mike