Nervous that AF is coming

Lisa
So I completed an <a href="https://glowing.com/glow-fertility-program">IUI</a> cycle on 3/3. Let's just say this 2 week wait felt like forever. So AF is scheduled to start today...but she is a no show. Good news right. Well, I keep cramping (like I usually do with my period), but no blood, not even spotting. I'm nervous to take a HPT because I'm afraid it will be BFN...planning for the worst, hoping for the best. I've taken a few tests already at 10 DPO that were a BFN. What gives me hope is seeing how light some HPT look on you ladies at 14 DPO. Thoughts? Advice?