Blood in urine/tumour in bladder

Just looking for some advice please. I had many problems earlier this year that resulted in me being diagnosed with a tumour in my bladder. It was removed and histology said there was no obvious malignancy but sample was damaged during removal. I've been doing really well and have been asymptotic until about 3 weeks ago when I developed a persistent water infection. I've had a five day course of antibiotics which didn't clear it and just finished a 14 day course today. Been for a surveillance cystoscopy today which was thankfully clear but urine is still showing a small trace of blood (but no infection) going to see consultant in a couple of weeks but wondered what next really. Does the blood matter if the scope was clear? I'm 36 so know this sort of stuff is rare in someone my age. Thanks