I’m still not understanding

Some of you ladies are pros at this opk stuff and this is my first time testing. I’ve read so much about opks and sometimes get conflicting information. i lost my first baby at 9 weeks back in June and I’m hoping for a rainbow soon. I had ovulated on CD6 with the first pregnancy so I thought I would start testing early and continue through until I get my period more so just to learn how my body works (because we are all different) and to hopefully catch my peak. I know the opk reader isn’t always reliable but there is a difference in my tests. One looks almost positive then drops back to negative and now looks close to becoming positive again. Is this normal?

Uhhh