metformin, if you are found to be insulin resistant will make your hormones even out. Its the most effective & least costly in treatment of PCOS but you will need to have a fasting insulin and then, insulin tolerance test to determine if you are insulin resistant.
Your testosterone levels are probably causing the extra hair growth, related to your PCOS, which metformin can help regulate the hormones which in turn will help your testosterone levels go normal, which in turn will releave your issues. Good luck!