I am a diabetic and l can't stress enough how important it is to keep your blood sugars low. If you get the b.s to high you start to experience other health issues.

Please treat your cholestrol if that is high - Use Plant Sterols 800mg up to 3 tabs daily.
Take Hawthorne for Blood pressure and cholestrol.

Alpha Lipoic Acid, another excellent antioxidant, is an effective supplement for treating neuropathy. CoQ10 in combination with ALA improves nerve function and neuropathy symptoms by improving antioxidant defenses.

Ensure you B12 is not low.
Your problems are associated with Metformin - Take Glyco-X 500 instead. Much better and safer than Metformin.

Please verify with your doctor if in doubt.

Don't let everything scare you. It sounds like you are experiencing neuropathy in your toes. There may even be some neuropathy in your leg too. Do you have back problems? Hang in there. Fortunately, some of the problems that arise from diabetes usually comes slowly. You don't need to panic. Just try and keep your blood sugar below 180. Above 180 and that's when damage can start. You just got diagnosed. It's a new thing to you but I have lived with diabetes (type 2) for 36 years. I was diagnosed at the age of 19 so it is kind of iffy whether or not I have type 1 or type 2 but whatever....I have diabetes.
You have other quesitons there that your Dr. needs to answer about the Metformin and etc.
Glad you are on this site. Then you can learn about how to live with this blessed disease. LOL. Welcome.

Ive never had discoloration with metformin.Tummy trouble yes but not that.Are you on regular or RX(extended release).The ER helps a lot with the gastric problems

Metformin has the same affect on me.