Levels changing throughout the day?


Hi, I’ve just started <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a>. My strips have been super light and finally this morning I had more color. I just took another one and there was no test line at all. Is this normal? I will say I did just have a chemical. Maybe my ovulation is just out of whack? Or can your levels go up and down? I haven’t even come close to a peak test and I’ve been testing since I stopped bleeding.