Late Ovulation with trigger?

[MKaykes]

Has anyone ovulated late with a trigger shot? I triggered the morning of Fri Nov 19 with IUI the following morning. My Progesterone 6 dpo was 12.5 confiring I O'd. I'm now 17 dpiui with a BFN (First Response Rapid Result so possibly just too low HCG for it to pickup?) My body feels like AF is coming (gassy and headache). I haven't temped consistently, but in comparing to previous cycles temp was down over the weekend (like right before AF) but back up today.

Is it possible that with the Fri trigger I didn't O until Monday?