8dpo. Temp dip. AF coming early?

[yourstruly10]

Hi ladies. Woke up this morning to find my temp dropping back off again. It's seems so early to me though. Could AF be coming early?
My temp is always taken at 5 am with no extra moment other then to grab the thermometer.
Any advice appreciated. Thank you
my chart is in my signature.

 

[Orglethorp]

Most cycles I get a temp dip at 8dpo, and it goes back up by 9 or 10dpo. Lots of ladies get a secondary estrogen surge that causes a dip that means nothing.

Of course, it could also be an implantation dip! 6-12dpo is the average window of implantation.