Worried about my appointment for a Cystoscopy.

I have most recently on three ocassions passed blood in my urine.

I was informed in late August that I was anaemic, the Doctor suggested a Bowl Cancer Test to see if I was loosing blood via my stools, the result was negative, thankfully.

I sent a sample this week and blood was found in my urine!

My question is, because they have only just found this, does it mean if there is a tumour present, it has only just grown?

I have to mention I had prostate cancer in 2011 and was lucky to receive 37 sessions of radiotherapy, plus hormone therapy.

My last psa reading 23/08/22 was 0.03. Thank you NHS. Also, could prostate cancer have returned, even with a low psa?