Dude, where's my egg?

Keri
Second round of Clomid, this month 100mg days 3-7. Now it's cd 23, and I have been peeing on opks at least once a day but twice a day most days since cd 8. I did have faint second lines for a few days. The last 9 days, not even a hint of a second line! I either missed my surge or I'm not ovulating this month. We have pretty much been bding every other night all freaking month, and at 39 years old I am tired! I'm getting pretty frustrated, last month I o'd cd 19 and my cycle is usually 31-32 days long. Has anyone experienced super late ovulation or not ovulated on 100mg Clomid?