Help. Diabetic nerve pain?

Em

For awhile I have felt my pinky toe go numb quite a bit. I rub it out then it is fine. Now it's starting to hurt occasionally.. I was diagnosed at 15. I'm 20 now. And i have a straight 7.0 a1c. I try to keep my sugars down as much as I can with diet and metformin 2000 mg a day. 1000 mg twice a day... wo why the nerve pain?...