OPK HELP? please respond!

So I'm on cycle day 4. My period ended yesterday. And I've been taking an opk every day since day 1 bc I don't have a clue when I ovulate. And lately I've been using fmu. And this morning I took one and it was to where you can't even see the line honestly it was that negative. And then I took one this evening just for kicks and giggles and WTF is this. Lol. Day 4! Is this even right??? This was PM urine the bottom one the one I just took.