Does anyone else get headaches just when they are asleep? You may ask how do I know if I am asleep - I have to get up to go to the loo, so half awake and headache always present then, but not during the day. Get blurred vision and floating grey bits in front of my eyes in the day, but not headaches unless INR so low I am having heparin injections as a safety net until it goes up. INR not stable, in fact up and down like a yoyo, but I don't think my body gets on with Heparin so no alternative until the new anticoagulants are available to me. The headaches at night don't interfere with life as such -just wondered if I am alone in getting this symptom.