Opk advice (the line is darker than the pic by the way)

So I've done opks for a while and usually have about 1 or 2 days like this picture then I get my peak. However this line has been like this for several days - anyone had the same? Got knows if I've already ovulated as my cm never really changes to ew any month and I don't temp. Perhaps my peak was a very small window during the day around testing?