18 days past ovulation and my cycle hasn't start yet

I called my doctor today and of course... she is on vacation. The nurse said she would talk to the other doctor in her practice and see what he suggests (I have never seen this doctor before fyi). He suggests that I wait until day 21 and give them a call. I haven't taken a home test since day 14. Could be two things at this point. 1. I didn't actually ovulate 2. I am pregnant 3. My cycle is just late. I am hoping for the second option as you can probably guess. This wait is a killer! Keep your fingers crossed!