Hi Tricky,
I'm 7 weeks post op (LBHR). I had a different medication for blood thinning called Fragmin, & I had to administer it every day for 20 days post op. I am having a normal and/or a somewhat speedy recovery, especially the first 4 weeks. I am told by my doctor and others that, the number one post op issue, or a frequent post op issue with resurfacing is DVT (deep vein thrombosis) which can lead to more serious blood clots in lungs etc. This is a serious issue and if I were you I would pay close attention to your doctor's orders with regards to blood thinners and follow all protocol to the letter, you won't regret it. Some doctors prescribe Coumadin, others Fragmin. You may think it is over precautionary, but it IS precautionary, not overly so, for good reason. Research this site and you find others who have addressed this issue. It must be taken very seriously. Pat can even tell you of her experience with this issue as well.
Good Luck!
Jeff