Has anyone had a cycle chart similar to mine, where they had sex only twice, and outside of the predicted fertile window but still fallen pregnant?

I only ask as I’ve had cramping, leaking thick + yellow milk (I stopped breastfeeding 5m ago), sore boobs, headaches, fatigue, nausea etc. I’m due in 8 days. I am not sure when I ovulated this cycle. He came in me both times we had sex.