I feel like I'm staring at an optical illusion

Sometimes is see the faintest of faint lines and other times nothing at all. Maybe shadow or indent? Idk how to do the inverse picture or what that really shows you.

I tried again with the cheap $1 Walmart test and it actually looked like the line filled in as the space by the got wet but then all the color faded. So I don't know if it is just too early to tell or what.

I've got no accurate idea of when I ovulated as I am still nursing and I've only had two postpartum periods so far that were about 50 days apart.