Question: I have UA report with some "abnormal" findings. The last few years I've been told ( during DOT physical for med card ) that I have small amounts of blood in my urine.

In the time frame including 2010 and 2011 I had 2-3 instances which when described to a doctor where thought to be " ... I was passing a kidney stone.."

I never had any testing done to determine what the actual cause of the issue was as it stopped occurring in late 2011.

As a precaution I did stop the use of an all natural salt I'd begun using in recent years.

At that same time in late 2011 I was prescribed an antibiotic for the concern that was described as "...a few white blood cells in my urine." Shortly after the time I was taking the antibiotic I began to see visible blood in my urine and an elevated INR of 5.9. I was not aware / nor told about the interaction between Warfarin and the Antibiotic by the prescribing doctor. I did not have any follow up testing done with regard to the UTI or visible blood in my urine. The visible ( thought to be blood in my urine ) stopped immediately when I stopped taking the Warfarin for a short time to get my INR back in therapeutic ranges. Having finished the antibiotic I simply monitored my INR and adjusted my Warfarin until my INR came back into therapeutic range. And went on with life.

Noticing the differences in my UT behavior over recent years - It seems reasonable I might have had a UTI and possible issue with Kidney stones in late 2010 to 2011. I have since been able to establish I have an apparent sensitivity to drinks with citric acid. That is to say that if I consume large amounts of powdered drink mixes containing citric acid I notice a change UT. When consumed they seem to create a slight sensation during passing of Urine and an increased frequency in desire urinate. I would not describe it as urgent or painful. Rather a feeling of relief or that it felt good after urination. Kinda like scratching an itch.

The R.B.C. began immediately after beginning Warfarin in 2005/2006.
I'm not concerned today about the R.B.C. ( 11-30 ) as they are likely associated with the Warfarin / Aspirin as you have stated. What I am curious about is the apparent persistence or occurrence / reoccurrence of the W.B.C.

Would my current W.B.C. present as a UTI with a AZO type self test. Would an AZO type test be a reasonable follow up test to determine if in fact the UTI was cleared up after a round of antibiotics? Could any of this be related to an abased tooth I've had for several years now?