i check my blood sugar randomaly , i hadnt done it for a few days so before tea i washed my finger and chaecked it was 15.9 i have never been this high its always 9s. my head is pounding not a headach more like a pressure which i have had before but still havent numbers this high. i have took my metformin so give give it a bit and check again . what do i do if it still high