HELP! OPK newbie 😖😖😖

Alright so I'm a little confused. This is my first cycle using an opk. I range from a 28-30 day cycle, so used 28 days since it was the shortest cycle to start testing which recommended cycle day 11. I figured I'd start a couple days earlier just to be safe. I had a little bit of a second line the first couple days which I understand according to the directions that the second line will be close to the same color as the control line when positive however, today, I started doing an AM and PM test after reading a few articles stating its good to test twice/day and both test were basically non-existent. Thoughts?