CD 17 peak, success stories!

My dr put me on 7.5mg of letrozole CD 3-7 after several failed cycles. I don’t believe I ovulated on any past cycles. But today I got my static smiley (peak fertility) on my clear blue advanced!!!! My only worry is that I’ve ovulated too late in my cycle. Do you think there’s still a chance? Since starting Letrozole five months ago, I’ve had perfect cycles 28-29 days, which has never happened before, I’m used to 50+ days in a cycle. Please give me your opinion or success stories!!!