Help faint lines!!

ana

Ladies, did <a href="https://glowing.com/glow-fertility-program">IUI</a> on 5/11 and tested 3 days after and then 5 days after. The first test is the one that kindda looks like a vapor line, very straight and thin. The 2nd test is the very light colored line. I heard the trigger shot can cause a false positive but the 2 lines look very different. The 2nd looks like it may be coming onto something to me. Any suggestions? Thanks!!!