welcome to health care magic
regarding to your query blood,white mucus in urine indicates presence of infection..that is urinary tract infection
..this is the cause for irritation and burning sensation during passage of urine.most probably a bladder infection..
even strenuous exercise also causes blood in the urine but that not causes irritation and burning..
or just a local physician to get your remedy..
hope you wil understand my suggestion..have a speedy recovery