Thanks, Jerry. I guess that is what we need to weigh - blood in the urine or no inhibition of the clotting factors, which one carries the biggest risk in my situation. I'm 70 years old and other bloody discharge has been ruled out via the above tests and pelvic and transvaginal ultrasound.
Since there are no other noticeable problems I'll probably just "ride it out" until I see my cardiologist in August.
I have been on 5 mg of Coumadin/Warfarin for at least 10 years. My INR is almost always in the target range 2.0 to 3.0. I never see any blood in urine, or elsewhere. I think when I "nick" myself with a sharp implement, I bleed more than I used to, but never a problem stopping.
I believe blood in the urine is one of the "no-no" symptoms and should be addressed. Maybe your doctor would agree to let you stop coumidin (replace with aspirin) for a few days and see what happens. It is possible aspirin may case problems by itself.
Of course, a female may discharge blood other than in the urine. I am a male so my experience is from that perspective.