My situation is similar to yours, however, my A1c was in pre diabetic territory for around four years when I requested to be on Metformin. I'm a thin exerciser, but T2 is in my family so I guess I'm genetically predisposed to it. When my A1c hit the high 5's I also bought a meter and drastically cut my carbs. Initially, my A1c dropped to 5.5, but then it crept back up again despite hardly eating any carbs for the next 4ish years. When it hit 6 I asked for Metformin, which I've been on for around three years. On Metformin, my A1c bounces back and forth between 5.6 to 5.9, with my last two staying at 5.7. As far as a downside to Metformin, I've been lucky in that I haven't experienced any of the digestive issues and diarrhea that a lot of people do taking this drug. It hasn't lowered my A1c as much as I had hoped. I think that may be because I'm not classically insulin resistant, meaning my fasting insulin has always been low before Metformin and continues to be the same on Metformin. Also, my fasting glucose has always been normal, in the high 80's to low 90's. My husband, on the other hand, is overweight and has high fasting insulin and slightly elevated fasting glucose. When he takes Metformin, his fasting insulin and glucose goes down in addition to his A1c, and he loses a little weight. Unfortunately, he does experience the digestive side effects so he's not as diligent in taking it as he should be. You can always give Metformin a try to see if it does anything. I'm on the ER form, which I've read is easier on the stomach (two 500 mg per day). I'd also like to add that I've read that non-diabetic women going through menopause often experience a rise in their A1c, as well as older men, and it is theorized that this rise may not be glycemic based. Have you had your fasting insulin tested? That would tell you more regarding insulin resistance. Also, if you have weight to lose, you may want to start there before the Metformin. The strange thing with me is that that when I added carbs back to my diet in the form of bread, my A1c actually went down from 5.9 to 5.7 and stayed there for my last two tests. So, I'm eating bread in moderation and as long as my A1c does not go back up to 6 I will continue. Good luck to you!