Absolutely, I've had really high fbg for the last two weeks+, I had viral illness and chronic sinusitis. I'm now better, and although I've had to fast to get fbg down, it is now within range. Hope you feel better soon, the numbers should drop once you are over the illness. All the very best, and I hope you recover soon.I have developed diarrhoea and sickness symptoms. During the last week my overnight (pre-breakfast) bs has been ranging from 11.4 to 15.7, which is unusual. Is there likely to be a connection?