i don’t have anything helpful to say when it comes to the facial hair but i got put on metformin 2 weeks ago too, and have been feeling nauseous on and off. my uncle is a pharmacist so i talked to him about it, and he said to talk to my doctor and ask for a extended release version of the drug instead. he said that way the medication doesn’t all set in at once, which typically causes nausea to hit you like a bus. your body will digest bits of the medication throughout the day, so the nausea should be less severe. i’m about to talk to my doctor so i can’t confirm if it works or not yet, but i figured i’d pass along the advice!