@carolak @b2byrne
One thing is to be aware of your current level of kidney function, that is, your eGFR. Most clinicians will hesitate to initiate a procedure if the patient's eGFR is 30% or less. That goes for anything requiring contrast. It takes a toll on the kidneys to clear the system, and can lead to severe problems.

Sometimes a patient has to have a dialysis session to help the kidneys clear contrast. I have a friend who recently has this happen. She is already on dialysis, by the way, and this was an added session. From Healthline: https://www.healthline.com/health/contrast-induced-nephropathy#prevalence

In the end, it is your decision. The reasons for a contrast study can vary, and all risks need to be addressed. @carolak, has there been any discussion about doing MRI or ultrasound as the source of your hematuria is researched?
Ginger