I totally feel like I have missed my surge this month. I am on 13dpo and that is the latest I have gone before o. I barely see any lines when I test. Yesterday I actually saw a line but it was nowhere near positive. Tonight was back to pretty much no line. Oh we'll, we will see what me temps do tomorrow. My last two days of temping was an epic fail. Out drinking sat night so I did not even bother. Last night had Trouble sleeping and woke up at 5:30. I temped then but dropped back asleep so I temped again two hours layer at my reg time. Not sure which to count. There was at least a degree difference.
f'ing bump ate my helpful post.
I think you mean CD13, not 13 days post ovulation (DPO). You have previously O'd on CD13, and you might start to see a thermal shift tomorrow.
Also, with only 3 complete charts, it might be difficult for you to see how your O date might vary (which is common for people).
Which temp did you end up charting for this morning? Your early temp or your late temp?
How often are you taking OPKS?
Keep taking OPKS, keep temping, and keep humping.