Hello and hope you are doing well.
The common causes for painless bleeding in the urine are infections of the kidney/bladder, disorders of the kidney/bladder, benign prostatic hypertrophy (BPH), certain blood disorders, strenuous exercise and certain medications. As you have a history of kidney stones and a stone has been detected in the ureter it could be the most likely cause. It may not be moving and hence there could be no pain.
Hope this helped and do keep us posted.
Hi,
How are you doing? Did the stone pass yet? I bet it was "on the move" and may have had ragged/sharp edges and as it moved it knicked you along the way .... What did your doctor say/do ? You okay? Please let us know.
C~