My tww 😫

Br
I had my first <a href="https://glowing.com/glow-fertility-program">IUI</a> done on Sunday October 4th would that make me 8 days past ovulation today? Or how do you know how many dpo you are? I get to test this coming Sunday the 18th but I'm anxious to know more so I know what to expect around that time..this tww is killing me!!Â