Hi fionay_68. Welcome to the forum.

I had a TURBT in June this year, although my surgery was I think somewhat less complicated than yours.

I suspect most of your pain is due to the urethral stretching.  This was principle cause for my pains after each cystoscopy and the surgery itself, and my urethra is normal!  Since yours was abnormally narrow, I think you must expect a longer recovery time.  For me, the worst was over in 24 hours, but I'm not surprised you're still in pain now.  

I found that OTC soluble paracetamol and codeine was sufficient to control the pain so you might like to try that. The hospital also gave me a pack of stronger codeine tablets, although I didn't use them.  If the OTC painkillers don't work, phone the GP surgery and tell them you're in a lot of pain and you need to see or speak to a doctor soon.  

Waiting for results after cancer surgery can be nerve-wracking.  I got my results four week later, which fortunately was good news, and then a couple of weeks ago I had my first follow up cystoscopy - also good news.  I hope it all works out as well for you.