4dpo opk getting darker?

[Dream.dream]

4dpo based on opks and cp and cm . My opk went positive and then got lighter and then are getting darker again . Did i not ovulate ?

 

[Dream.dream]

https://i1174.photobucket.com/albums/r606/quillzmom/20170223_173644.jpg

Opks last 2 days and then todays

 

[Dream.dream]

Updating in case anyone else experiences this

I got my bfp . So the ovulation tests staying postive was a sign for me