I'm a 42 year old woman, been on Coumadin on and off for almost 8...

I'm a 42 year old woman, been on Coumadin on and off for almost 8 yrs due to 2 DVT's after childbirth in February, 2000. The scar tissue has completely blocked the main vain in my left leg and am on Coumadin to prevent new clots from forming. Symptoms from the beginning have been: memory problems, concentration problems, fatigue, low libido, every muscle in my body hurts to the touch, my skin looks like I have smoker's skin (I don't smoke), anxiety, rash around my ankles, I have almost no patience on most days and continual hair loss. They changed my dosage 5 months ago to 10mg one day & 7.5mg the next 2 days. Since, then symptoms have gotten almost unbearable at times. My current Dr. claims the Coumadin isn't causing any of it and won't listen. 5 yrs. ago, during my second pregnancy, I was on heparin shots twice a day instead of theoumadin and I felt incredible. Why is it that when there are so many people that have problems with this medicine, nobody will listen and come up with a solution C?