Can Taking Metformin Be Safe For PCOS ?

I had POCS 6 months ago and treated by Metformin for 2 months and it is gone.But I still have thick hair on my face and acne on my face and body,so I had a hormonal test.Everything is fine but the testosterone result is 0.129 ng/ml .Is it ok ?and what can I do to solve my problem .I am very tired of the hair and acne. I am 25 years old and single.