8 dpo dip below coverline???

Jess

I have a 15 day lp. And have never had a temp so low. My other temps were higher than my average, so I thought my progesterone was high this cycle. Am I gonna start af this early!? Am I dying!? This is my 4th mo charting bbt & never had this happen. I read implantation dips aren’t a thing.. Any insight?? TIA

(PS the dotted lines are from where I was entering my info in at dif times. Didn’t know there was a setting to change it to 6am daily til couple days ago)