Hi everyone, I usually ovulate on CD 15 or CD 16. I couldn’t do my OPK on CD13 but it was extremely light/negative on CD12 and I got a positive on CD14. My surge only usually lasts a few hours, never two positive days in a row. My chart is saying I ovulated on CD13 which doesn’t make any sense with when I got my positive OPk and my normal ovulation time. Last month I had a fall back rise/ temp dropped below coverline at 3dpo. I’m thinking I still did ovulate On CD 15 and had a fall back rise again at 3dpo. When do you think I ovulated? Is it even safe to say I have ovulated?