Confusing opk!

Yanina

So I’m currently ttc and I’ve been using these opk predictor kits which have been really helpful (I got pregnant using these). So this morning on my routine morning urine collecting my strip came out pretty pale looking. Today is my 14 day cycle so I thought “maybe tomorrow”. I ate breakfast and went out to do some errands. Came back an hour later and I decided to test again. It came back visibly positive within a minute. I would like some feedback on this: is it normal for it to be positive just a few hours after it was clearly negative? Or is it a faulty stick? Have you had any experience with situations like this?