Almost positive opk on 10dpo

Chloe

I had 5 days of really positive opks which started on Thursday 13th July and eventually finished on the 18th July and then confirmed ovulation with bbt on the 19th but now I’m confused as I’m 10dpo today, and this is what my opk looked like this morning. I know it isn’t positive, but it’s still quite a high negative result?

AF due on Wednesday 2nd.