Hi thanks for your question.
Commonest cause of pain in the back with haematuria (blood with urine) is kidney stones.Urinary tract infection
(UTI) infection is second possibility.Consultation with general surgeon
is advisible till you get an appointment with urologist
.You may need ultrasound genito urinary system
and urine examination to confirm or rule out possibility of stone in kidney (or any where in urinary tract) and UTI.
Hope this answers your question.