I had a pyeloplasty 35 yrs ago, a Lithotripsy 14 days ago, and a ureteroscopy 7 days ago to deal with those stone fragments too large to pass and blocking ureter. I have a stent to be removed 21 days after ureteroscopy. I had bright red urine for 3 days, & now have blood-tinged urine but mostly yellow. However, consistently, when I walk I have dark purple or bing cherry coloured urine. Is this normal? Should I be concerned?