I have been diagnosed with PCOS, I have extremely long cycles (first of BC was 120 days and only got it by being induced with progesterone - Second cycle is currently on day 155 and i'm on my 8th day of 10 days of progesterone, should get AF in the next 2ish weeks). I also had an ultrasound where they saw some cysts.

My doctor did some bloodwork and said all of my levels are normal, including FSH and insulin. He said he would start me on chlomid, but i wanted to try Metformin first to see if that works. I took my first 500mg does last night, and am ramping up to 1500mg over the next 10 days.

So, my question is, how long does it take metformin to regulate your cycle? I'm assuming i'll get AF from the progesterone fairly soon, does that mean my next cycle after that will be regulated by metformin? or does it take longer than that?