I have been on Metformin since June 2016 and just wondering how long it took to work for some of you? I haven't lost any weight and I haven't had a period either. Idk if my dosage is too low or it takes awhile in order to work. I'm starting to get bummed that nothing seems to be happening. The only thing is lately I have been having some nauseous if I don't eat right away sometimes.