my meter tells me that my glucose level is high. I administer insulin and the meter tells me that my glucose level is still high. After administering more insulin my meter finally tells me that my glucose level is 89 mgdl but I am feeling a little faint as I would when my glucose level is low. How do I test the meter to be sure it is performing properly? My test strips are still in date and due to expire in early November 2011.