Hi Tarbe,
I have IFG too. I'm no expert, but 39g does seem a tad high!
I was diagnosed 3 years ago, did nothing about it for 2 years, and got a verbal kicking from a T2 friend of mine!
So, I changed my diet (no sweet stuff at all, cakes, biscuits, chocolate - the lot!), lost 2 stones in weight and my average BG levels are now 4 - 7, 8 to 9 if I'm really unlucky. All it takes is the right diet - for me anyway.
One of the experts on this brilliant site may be able to answer your questions, but have a look around and I'm sure you'll find answers to questions you haven't even thought of yet!
Welcome!
D.