Did anyone ever had a positive way later then 13 dpiui

Hi everyone i been ttc for 3 yrs and i never really had symptoms before period but this time around seems like it.... im 12 dpiui and got a negative yesterday..... and for some reason i think something is up this time i have trigger at cd 12 <a href="https://glowing.com/glow-fertility-program">iui</a> the day after cd 13