Hello and hope you are doing well.
A person with a normal-size ureter can usually pass a kidney stone with a diameter less than 5 mm. As the your stone size is less than this, your doctor may wait for it to pass. The blood in the urine is due to the stone. If it does not pass, ureteroscopy may be needed for removing the stone.
Hope this helped and do keep us posted.
Also, I could not see any blood in my urine. But report says urine has blood. Also, there was some visible blood in stool. Any clue whats going on ?