14 dpiui and wondering about trigger shot


Hi everyone! I’ve been ttc for 2 years and have finally resorted to getting an <a href="https://glowing.com/glow-fertility-program">IUI</a>. I’m 14 dpiui and at this point still getting extremely FAINT positives. Yesterday I got a bfn and gave up hope completely on this cycle but then today I got a vvvfl. So confused. With early response tests, wouldn’t I see a stronger positive if it worked at 14dpo?? I just don’t know what’s happening and it’s driving me crazy. Squinter pic attached for opinions.