OPK Dried Darker-Positive?

Kyla • Me: 29 DH: 29 | Married Aug 2012 | TTC #1 since Aug 2013
Took opk tonight on CD 11. The line was almost as dark as the control line, but not close enough to consider it a positive. opk dried and the test line is now as dark as the control line... Should I consider it a positive? Or is any change to the test line after the test time a moot point? Thanks!