My Dad Recently Had Bronchitis And A Bladder Infection At

My dad recently had bronchitis and a bladder infection at the same time. His bladder infection was bad enough - the doctor put in a catheter. He just today finished his levaquin and saw the doctor and got an all-clear on the bronchitis. Mom told the doctor he saw today that had been blood in the urine catheter bag. The doctor said this was normal. (Dad is in warfarin also). Dad has an appointment on Monday with a urologist. He still is wearing the catheter. (It's been over a week now). Tonight the catheter collection bag is very red but no clots. Should we be concerned? Definitely it seems bloodier as the day has gone on but he's also walked around the house a bit more to try to get his strength back. (He is nearly 86 yrs)?