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im glad you are alright, did you ask the doctor about it? ^_^ from what i read, many days of headache could possibly be a sign of blood clotting (clots can form for weeks while your brain also builds new blood vesels around the clot), but i guess your blood clots redissolved its self without doctor needing to give you medicine to help you dissolve the bloodclot.

oh that's bad but good that it disappeared again and was not too serious.