Question about Lh surges and af

Megan • Mother 2 boys 1 girl. MC 9/17/18 CP 11/9/18 TTC 🌈 #4

So I bought an opk. And I’ve never used them before.

I’m now 7 days late (no positive pregnancy tests and I wasn’t using the Lh strip to try and solve a riddle that way)

But as a curious person I used one when they came in the mail. And it wasn’t blazing positive but it was a darker line.

My question is. Would this be hope that af is finally coming? I haven’t had a crazy drop in temps yet to signal it’s coming. I’m just so confused. I had a chemical last month and a d&c in September from a mc at 12 weeks. I’m wondering if my body is regulating from last month maybe?

Does any one know about Lh surges that could offer me some insight?

Thank you❤️