HI, Welcome
i agree with everything Pavlosn has said, its hard to listen to the doctor for many (especially me) its hard to take it in especially when being given confusing or bad news so maybe call the reception and ask for a print out of your results etc? if you are diabetic or pre diabetic (ill assume you are diabetic as you were given metformin) the treatment is the same, a lifestyle change is in order, we as diabetics find it useful to eat healthy and get some exercise if possible, try to cut out all sweet products, reduce your intake of bread, rice, pasta and potatoes, these foods essentially turn to sugar once eaten, therefore its a good idea to reduce them because as a diabetic/pre diabetic we have trouble processing the sugar, so the less we put in, the less we will have trouble dealing with
its not all bad, diabetes can be a blessing if changes are made to our lifestyles
have a read of the forum and ask questions as they come up, always someone here that can try and help
(this is all just my opinion, I'm not medically trained)