Hello, Indeed, the use of Primolut N is associated with the risk of having blood clot. In your case, I d advise to discuss this with your gynecologist and reconsider therapy. To me, the very first thing is to understand why you are bleeding. And the answer is: Warfarin. Taking blood thinner is associated with certain side effects like gastrointestinal hemorrhage or even heavy periods (metrorrhagia). You cannot stop using warfarin as long as your body needs it after heart surgery. However, you can switch to other blood thinners. Indeed, there is a need to get your case revised by both gynecologist and heart surgeon in order to decide for the best treatment strategy. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Albana Sejdini, General & Family Physician