Warfarin Sodium Tylonel 3, Head Temples, Wafarin, Tylenol 3, Mris

I've been on Wafarin since September of 2008 because of a massive DVT stretching from my jugular vein to my right arm. Since the initial injection of Heparin and oral consumption of Wafarin I have experienced daily migraines. They seem almost like 'pressure-headaches' pushing on the sides of my head, temples, forehead and the bridge of my nose. My thrombosis doctors have sent me for Ophthalmology tests, MRIs, and plan to send me for Neurology tests as well to discover the cause of my headaches. They've put me on codeine, Tylenol 3's, Gabapentin, Naproxen, and Co Sumatriptan because of the fact that I'm so immune to painkillers in general (For the blood clot pains themselves, I was on Hydromorphone, Morphine and Codeine). Although the Co Sumatriptan along with the Tylenol 3's give me some relief, I can't help but wonder if the cause of my daily migraines are from the Warfarin itself.
My doctors are reluctant to agree with me, saying that they plan to take me of Warfarin within the next few months, but aren't certain of exactly when.