I've noticed a common misconception in regards to BBT peaks and valleys, positive OPKs, and actual ovulation. Many think PositiveOPKs+BBTdip=Ov, but it's actually just a way of letting you know it's SOON to come, BD so the swimmers are ready and waiting inside! The peak is there to tell you it happened, your Progrestrone has surged! That's considered your Ov day, your '0-DPO' on the chart. I attached a screen shot with a chart from Glow creators. Baby dust my TTC friends! ☄