Ovulation on Metformin

Okay ladies, this is my third cycle on Metformin. Long story short I surprisingly got pregnant at the beginning of this year, but I tragically lost my baby boy at 18.5W. So my husband and I are desperate to conceive again, and have been actively trying since July. I was diagnosed with PCOS in July as well and am currently on my full dose of 2,000mg/day. I have been using ovulation sticks for all three cycles and I have never had a clear positive. My OB wants me to track my temps too so I just started doing that. I am just wondering how long it took for you girls to ovulate after being on metformin. I get so discouraged with those darn ovulation tests but I know it's possible. Any hope or insight you ladies have will be very well appreciated! Thank you in advance!