I have had my blood taken for tests many times before and never had any problems (so never really bothered knowing what they're for).
I just rang up for some results and my full blood count is apparently a little abnormal (I spoke to receptionist not doc) and they want me to go back in 2 weeks for a retake... it is a long time away and if something is up with me I don't want more attacks in the mean time.
Has anyone else had this?