IUI and early testing

Me

Did anyone here ever have an <a href="https://glowing.com/glow-fertility-program">IUI</a> and test early? If so, how long did it take for your hcg level from the shot to wear off? I’ve been testing even though I know that’s dumb and have been seeing vvfl. Today is day 12 so I’m not sure if the hcg from the shot would still be in my system or not. Help!!