Thank you for the query.
Possible blood in urine should be always checked as it can be a symptom of urinary tract infection
or even urinary bladder cancer
. This is not an urgent condition so you dont have to go to ER, but you should visit your doctor as soon as possible and have urine analysis and abdominal ultrasound
performed. If no findings, you should visit also gyneacologist.
Hope this will help.