2 Weeks Late...Negative HPT

Diane
My period is officially 2 weeks late. My husband and I have been ttc for over a year and I've never experience anything like this. Around the time my period was due, I kept having to run to the restroom because it felt like I was going to start any second. BUT, it never showed. I've taken a ton of tests but they have all been negative. Has anyone ever experienced this?