I was in the exact same boat as you. I was also prescribed Metformin for PCOS but I had no insulin problems. Please look into it more before you start and seek another opinion. I did, and the doc was horrified that they had tried to put me on it. It is not approved by the FDA for PCOS, it's a diabetes med. It's not going to do anything for you if your blood sugar levels are fine except make you sick. Google the side effects, they're pretty nasty. Metformin can be super helpful in treating PCOS patients but only if they have insulin problems. Just make sure sure you do your research!
Good luck in whatever you decide
