CD7 opk - question

[Loozle]

https://i826.photobucket.com/albums/zz181/lauren_sumner/5A4ACA75-CC9A-4C8C-BDE3-9FDE482C64EF.jpg

Hello! I'm cd7 today and this is my opk. I know it's not positive but I think it's fairly dark. My question is, when should I test again? This evening? Tomorrow? I don't know how long my cycles are as this is my first cycle off the pill.
Any idea when I should expect a positive after this opk or is that a "how long is a piece of string?" type question lol.

 

[Loozle]

Whoops, sorry it's so big, in using my phone and don't know how to shrink it!

 

[misscyn]

If you have many tests, you should consider testing twice a day, like every 12 hours. If you don't have a lot, then every 24 hours. I get my OPKs at the dollar store, so I can easily stock up (they only cost 1,50$ a test). Good luck!

 

[whigfield]

Definitely agree with twice a day if you can afford it. Sometimes your surge can be very short!