Trigger shot not fading

Hello! I did two trigger shots of ovidrel nine days ago and I am still seeing it linger on the tests. I know they are getting significantly lighter but the last few have

just been lingering and hanging around. Today is seven days pass <a href="https://glowing.com/glow-fertility-program">IUI</a> so I think I am still early for a positive pregnancy test but I’m just curious how long it will take for my test to be completely negative. Any thoughts?