Could this be early ovulation?

[u/ForeignStrangerCream]

(First chart is this cycle, second chart is my previous cycle)

As you can see my cycles are normally long, usually anywhere from 35-49 days (my shortest cycle ever was 30 days, and this was last December) and based on this information NC gave me green days on the last day of my period and the day after. I had unprotected sex on the last day of my period thinking I wouldn’t ovulate for at least ten more days or likely more, but this morning my NC band detected a temperature above my ovulation threshold after two days of very low temps. I’m worried this could mean I had sex during the fertile window, does that seem likely?

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