What day would I consider ovulation?

Well I was taking opk this month, I had a pretty dark line on cd 13 and cramping on cd 9-12, I also had a dark line on cd16 and I've been cramping since cd16 ( which was June 9th), I've been nauseous, bloated, my lower abdomen has been extremely tender,my breasts have been tender, I've been really tired and I was irritable yesterday. This morning I had a very painful cramping that lasted 5 min. I know it's too early to have pregnancy  symptoms but maybe I ovulated earlier then I think? Here's a pic of my ovulation tests, tell me what you think please