I'm so confused ?! help!!!!! OPK test!!!!!

Hannah • Hey 👋🏽 guys. 2 year old. Engaged. Trying for baby 👶🏽 number 2! 😍💙👶🏽😘🙌🏽
Okay ladies. So these 6 tests are OVULATION tests. I have been testing since the 9th. According to glow my fertile week is the 12-18th with my highest peek day tomorrow the 16th. I feel as if I have already ovulated. Before I started testing. My period ended on the 4th of this month. Here's the 6 tests. 
They just seem to not even be getting darker. But ALL of the test lines on every single test have evaporated. Idk why because when I see other women post their weekly OPK tests BOTH lines are ALWAYS there. Anywho. All lines are gone except the one on the 3rd test. Even the one I took today is gone. But this is the 3rd test in regular and negative 
Does anyone know why this is the ONLY test still with a line?! Could this have been the day I've ovulated. Me and my SO have BD every days of my "fertile" week.