Confused about ovulation

Stacie
Okay y'all I'm so confused lately. This was my first time taking Letrozole. I took the first opk last Monday and it was positive. That was the very first time I've gotten a positive opk due to the fact that I don't ovulate on my own. But everyday for the past week I've gotten positives on my opks still. I thought when you got a positive it was supposed to go away the next day or so? The picture below is an opk I just took. So it's been 7 days straight of positives! Also I started spotting yesterday and still am today. It's very light. Anyone have advice or anything? Has anyone gone through this before? Thanks!