It seems she may have put you on Met automatically just because you are diagnosed. My doctor wanted me to take it but I declined, since there are natural ways to controlling/reversing PCOS. Since you have minimal symptoms, why put a drug in your body? It is only masking PCOS, not reversing it. It is very sad that doctors are so quick to just prescribe medications, and are not educated in alternative methods.
I would listen to your body. If you feel significantly better on Met, then maybe it's a good choice. But it's still a drug, and one must decide if it's a life-long solution. Most drugs are only a temporary solution, and are marketed heavily just to make $$. I know that Met can be live-saving for diabetics but sometimes it is overly prescribed. So do some research yourself and make sure you're comfortable with your decision
Again, it may be a good decision for you!