15 days past iui

Taylor
It's been 15 days since <a href="https://glowing.com/glow-fertility-program">iui</a>. My RE instructs me to test after 14 if af doesn't show. Buuuut...I'm too scared! I would rather start my period than see a negative test. Anyone with me?
I Have had cramps for about a week, which is very unusual for me.. I normally start cramping hours before I start bleeding (tmi) and then of course throughout my period. Never like this. Nipples and boobs sore.... 
 
I know I should test, but I'm chicken!! Lol