I also had DVT last July, then had blocked arteries in same leg in August and bypass surgery in September. I was on fragmin injections for 4 months and now on coumadin. The cause of my clots is lupus anticoagulant syndrome. Have you been tested for that?? The clot took from last July to February to dissolve. My understanding is it will depend on how long it takes your body to dissolve it and how extensive it was to start with. They also told me I would not get more clots if I stayed on the coumadin and the levels were right. I go for blood tests about every two weeks and they want my INR to be 2.5 - 3.5. Be careful of any leg pain because I told them I had lots of pain in my leg after the DVT and they said I just had to be patient but it ended up being blocked arteries and I almost lost my leg. Keep after them for answers...pain shows something is not right! Good luck!!!