BBT drop after period

Bruna

Hey all, I know it’s really early in my cycle (CD 6) but I had a huge dip in my BBT today and it fell well below the ‘normal range’ (temp today was 35.62 degrees Celsius). The only time I had such a dip was right before ovulation last cycle, but it’s too early for that. So I’m wondering if there’s another explanation for it given the temperature is so low? Anyone has experienced such low temps? Thanks!