Is it safe to take metformin during breastfeeding

PCOS patient is well aware of the fact that PCOS and metformin are co-joined twins. They always go hand in hand. Ever since you have been diagnosed PCOS, your metformin journey starts. It becomes a part of your life with minimal 500mg, can grow upto 2000mg or more depending on your health condition, recommendation from your physician
Now, lets talk about breastfeeding, consumption of metformin during breastfeeding, safety issues associated with this.
Note: I'm not a doctor. Please talk to your healthcare professionals, get professional advice before making a decision
1) Metformin helps with insulin insensitivity. If not consumed this will impact your metabolism terribly. Hormonal imbalance during breastfeeding is not safe. So, we can continue metformin as such
2) Lactation consultant says, we don't have guidelines on metformin and its real impact, safety while breastfeeding. Pediatrician is the person to go. However, PCOS patient find it terribly difficult to generate sufficient milk. If this is safe, you can take it as your gynecologist says it will help with hormone regulation. As a lactation consultant I need proper hormonal balance for my prolactin
3) Now comes critical pediatrician advice : They asked me to refer to a website.It is U.S National Library of medicine popularly called lactmed in which you can search for metformin, see more details on what research says. If you are convinced, go ahead with metformin consumption while breastfeeding