I have colon cancer, I finished my chemo 6 weeks ago. Before my chemo I was on coumadin, I had to stop my coumadin due to the chemo, I was taking fragmin during my chemo. I started taking my coumadin 3 weeks ago. During chemo I lost about 20 percent of my hair, however now 6 weeks later I'm losing my hair like crazy I can actually see my scalp on top of my head. What do you think could be causing this?