Just wondering if any metformin gals had to go back onto the medication to TTC.

My cycle returned by themselves post baby at 13 months post birth and I am currently on CD 46 and no signs of ovulation (not taking BBT each morning, just observing CM etc - can't figure out how to take BBT at same time each morning and after appropriate sleep). We aren't TTC but I am trying to work out what my body is doing and wondering whether I should start the process of going back onto metformin.