So last time I did a trigger shot i started bleeding around 8 days after it. So i didn’t even make it to 14 days after?? Anyone know why?

This go round i did trigger shot and <a href="https://glowing.com/glow-fertility-program">iui</a>... this may be a stupid question but what happens if the sperm didn’t fertilize the egg? I understand I’ll start bleeding but would it be before 14 after trigger or before? I hope i made sense lol 🙈