Usually I start seeing it 3-4 days before O day. It actually gets more watery right before I O. So, I usually O CD13 or 14... I see EWCM CD9-12 or 13. I wish I had more of it, so to help I take Mucinex (the max strength 12 hour expectorant) once a day on CD9 til CD13. I get congested from allergies anyway so my doc said it's fine to take, just not every day all the time. It increases EWCM (the active ingredient guaifenesin). I also use Preseed if we want to use lube.