Opks can someone help me please

Lauren • 31, partner is 35. We have two children, William 9 & Georgia 1. I am currently pregnant with baby 3. I work with domestic abuse victims in the north east. Partner is a roofer/joiner.
So I thought i ovulated Friday. I had posted a pic of Opk. But I've just taken one and I'm sure it's positive. Bottom one is from tonight, 5 mins ago. The one above it is this morning. And the three above that are yesterday. And above that is two from Friday. Am I ovulating today???