Opk question....

Michelle • 10/01/09 ⚾️, m/c 12/31/11, 1/31/13 🎀, 5/6/15 ⚾️, m/c 8/9/18, 3/19/20 ⚾️

I've never had 2 days worth of + opk...what does that mean? Lol

We are TTC #4 & it's always been 1 surge & then a barely visible line the next day!