So confused...help?

Heather
Ok ladies. Help me out here. My husband and I have been trying to have a baby for close to a year now. We've had him tested and also have ran tests on myself. This will be my second but his first baby. But anyway, my period was supposed to Start on the 11th of March and never came(still hasn't) I've taken numerous tests and they all keep coming up negative. My period has been on time and never late like this before. When I called my dr they told me to just wait for it. It's going on 11 days late. What should I do? I know this sounds like a crazy question but is there a chance these negatives are wrong? Help :(