Hi, I'm carolyn,52 yrs,and was diagnosed by chance a week before Christmas. My eye consult ordered some blood tests and within 2 hours I had been contacted by my gp, diagnosed and was booked in for urgent appt with the haem clinic. My haemoglobin was 20 and my haematocrit 67. Once phlebotomy gets my blood normal I am commencing hydroxycarbamide. The thing is I am just terribly exhausted.and although my blood picture is almost normal now ,I get this horrible head fog. Can anyone give me some advice or reassurance about this. I've read quite alot on this fantastic site . Need help.