Updated - How many DPO according to BBT chart?

Mi

My opk was positive on CD16. I’m currently on CD25 and my cycle is regular (usually between 28 and 30 days long).

Here is my chart so far (it’s a bit chaotic) :

According to that, how many DPO do you think I am? Is the count on the graph accurate? (it says that I’m 8DPO)

Thank you!

Update : I got a positive pregnancy test the following day on cycle day 27.