Periods late

Jackie

Hey ladies, I've been ttc for 2 years now and my husband and I are about to do our first <a href="https://glowing.com/glow-fertility-program">IUI</a> in March. Well I'm 3 days late for my period and I'm gassy,nauseous, and crampy! I feel like I'm about to start at anytime. I'm usually not this late and I'm nervous to take a test because seeing another negative sucks. Have any of you had those symptoms and got a bfp? I just don't know if I should wait a couple more days or test.