Metformin for Ovulation

Ok, today I was prescribed 2000mg Metformin a day (1000mg × 2 pills per day) to try to regulate my period and start ovulation. I am 35 years old. The dr said that I ovulate maybe once a year so we have not been able to get pregnant. We have been trying for 2 years. I also recently started the keto diet to try to lose some weight. Has anyone had luck starting to ovulate again on Metformin?