There or nearly there? Updated why has this happened?

[CharmedKirsty]

kirsty/media/Mobile%20Uploads/image-1.jpg.html]https://i12.photobucket.com/albums/a213/charmed_kirsty/Mobile%20Uploads/image-1.jpg[/URL]
Above is yesterday's. Now 24 hours later I have this. Can anyone explain this to me?
https://i12.photobucket.com/albums/a213/charmed_kirsty/Mobile%20Uploads/image-2.jpg

 

[KitteyKat2010]

I would say almost there Mine are like that as well, so I am guessing we both will be ovulating soon

 

[Ashley8806]

Looks like you may have already ovulated, sometime between that darker one in first pic to 2nd pic