Ovulation tests

Kristin

My OPKs we’re getting darker a few days ago and then all of a sudden started getting lighter but I never got an actual positive. Today, the test I took got darker again and was almost positive. Should I assume I missed the peak the first time and already ovulated or that I’m on my way to my peak now and will ovulate in the next couple days? Today is CD 15 and I don’t really know much about my cycle because I just had my mirena taken out August 30 and hadn’t had an actual period to really track. But before my mirena and before having my son, my cycles were usually 29-30 days I believe.