 [ Symptoms ] what do i do if my blood sugar is 558 and i have congestive heart failure and never noticed sugar problems before  my friend checked my sugar and it was 550 and 10 mins later it was 558 and i have been very thristy and sleepy i have not noticed a problem with my bllod sugar before i have had this problem with my levels being no less than 427 as my blood sugar and today is the third day since i have been checking it please respond back asap [ Disease ] go to the doctor a s a p >^ ^<