Do you think this O date is correct? BBT Charting?

I'm answering a few days after the above poster so I have a few more days of your chart to look at.

I'm going to say that it could be ovulation, but it could also be the metformin that's caused your body temp to increase. It takes a while for metformin to build up in your body and do its thing. After a week of taking it, your hormones probably adjusted somewhat and your basal temp went up.

Your chart says you are 19 dpo today, so a test should come out positive by now if you were pregnant. I hope you get a positive, but if not, it could be the medication you're taking has caused the temp increase.

Good luck!

Oh, and there's also a lot of open circles on your chart which usually means inaccurate data. If you're going to put in the effort to chart, you really should be doing it exactly correctly so it will be easier to read and make more sense.

Your O date seems to make pretty good sense, looking at both CM and temps. The most accurate setting is "Fertility Awareness" which I think would still give you an O date somewhere around there. If you're around 17dpo, have you tested yet?

Good luck!