... His levels are between 2-3 regularly.He has developed pain in the other side of his back and has very bad/ painful days that seem to be more consistent. He cannot sit or stay in one position comfortably for very long at all. He also says that after he takes Warfarin, he has a sensation of something biting him all over then it goes away. His GP says the pain will come and go but we are concerned he is developing another clot