Burning skin?!

I have recently had burning skin it feels almost tingly it is a combination of a lot of sensations and is usually just on my arms!. I feel it the most before I fall asleep, also before I fall asleep I feel very weak in my upper chest and arms area, sometimes it feels like it is hard to breathe like my body is working to just breathe!. I at first though this was my pregnancy, but now I am starting to suspect that it might be glucophage/metformin causing this!. I am taking Glucophage(metformin) while pregnant because this is what my doctor wanted!. I was reluctant and I asked a lot of questions, now she has me on 2000 mg of glucophage a day, I don't feel comfortable with that!. has anyone else experienced this sensation during pregnancy or on glucophage!? I see my doctor very soon and will be telling her, but in the meantime any advice would be appreciated!.
I have type 2 diabetesWww@Answer-Health@Com

---

---