I take Metformin to (I have PCOS, and not diabetic also), the only reason you will get a low while on Met is when you don't eat. I used to get a lot of problems with my blood sugar droping if I did not eat and if I ate something that raised my insulin levels before I was put on Met, now its very rare.

Keep up with reagular snacks and don't skip main meals and you will be fine.