Hello, my name is Cherie and I just turned 60. 6-15-54. I have been on Warifin now for 5-6 years now . I have artificial artery in my left side of my stomach about 6 inches long ( by pass), with serveral stints on the other side, after one year the by pass was completely blocked, and they did stints and fixed that. Now I m on vacation with severe ons et of headaches, I mean they all most drop me to my knees. I am 135lbs over weight. I live in Green Bay, Wi. but I m in Hawaii for 4 more days, and back to Anchorage Alaska. I know you will tell me to see a Doctor, but should I get help right a way? I have had about 6 episodes now in the last few days , first one was due to a lot of walking pulling lougage, second climbing a hill, and now without any exercise, and lastnight and this morning while just laying in bed Coming on more frequently. I m drinking more water, and avoid and kind of exercise. The pain is right behind my eyes and temples.I was in an accident 3 weeks ago, and hit my head, but had CT and MRI and everything was ok. I m so afraid of this warifin and worried that there might be some bleeding going on in my head, but that s just my fear taking over. Other than going to the hospital what could be causing this onset?