When to test??

I did my <a href="https://glowing.com/glow-fertility-program">iui</a> on 11/24 and got my trigger shot on 11/22. This is my first time with <a href="https://glowing.com/glow-fertility-program">iui</a>. Have been on 3cycles of clomid and 5cycles of letrozole before this. So was just curious. The doc office said not to test before 14days . This wait is literally killing me. When is it too soon and chances of getting a false positive. I really cannot afford to see a false positive coz the I will be shattered