Hello kmad and welcome to the forum... First I just want to say bravo to you for taking charge of your care and going to a hospital where you feel your needs will be better addressed. News like this is a punch in the gut that leaves you barely able to breathe.
The pain you experienced that took you to the ER may/may not have been related to your bladder, but it might be a blessing in disguise if in the course of looking for its source, a developing bladder tumor was found. At 1.5 cm, that is still fairly small (mine was 1.6 cm which is about 2/3 inch) and with any type of tumor, the earlier found and treated, the better. They don't turn out to be benign very often, but sometimes it does happen. The pathology report after your TURBT will determine whether it is a bladder cancer or not. Also keep in mind, even if it is, these days bladder cancer is very treatable. You will find lots of posts in the forum that attest to that.
As far as the procedure, it is usually done outpatient unless there are compelling reasons to keep you overnight. Given the distance you will be traveling, it may depend on if/when they want to recheck you. I went back the next morning to my local uro, and I have seen people here say they went back after a "few" days. Maybe a call to their office and ask about post-TURBT procedures they have in place would ease your worry just a bit.
Did you see a urologist at any point during this? If your pain continues or increases, try to see a local uro, or your primary care physician in case it is not your bladder causing it. You shouldn't have to be in pain for the next 10 days.
We are here to help as much as we can, especially when people like yourself are first diagnosed. Most of us have been right where you are and know how scared and confused it leaves you. Please post any other questions you have leading up to your TURBT on the 16th.