What this mean when have red blood cells in my urine as I was told from my family doctor. It's this risk?

Hematuria. this could be contamination from vaginitis. lack of estrogen in 53 y/o female causes this vaginitis ..you should see a urologist who will obtain a sample of urine by strait catheter to prevent contaminations and the sample of urine will be cultured and examined. if the hematuria persist then further investigations will be needed.