PCOS/Metformin Questions

I have PCOS and have been taking Metformin since early July. Prior to taking Metformin, I didn't have a normal monthly cycle. After the first month on Metformin, I did start my first monthly cycle. It was a little long-35 days compared to the normal 28 day cycle, but hey, you take what you can get. Lol. Now I am at 32 days of the second month and still nothing yet. My question is if you had these same situations... nothing before and the month after you started on your own.. is it maybe that I just haven't waited long enough for the second cycle?? Or that maybe it only worked that one time for me?? Thoughts??