AF 7 Days Late- Negative Test

TTC #1, AF is 7 days late if it doesn't come by end of today. I have been tracking my period for 6 months and it has never been more than a day off schedule. Took a test everyday since missed period and all BFN's. Has this happened to anyone and ended up being pregnant? My regular period symptoms came for the day before expected period and day of expected period and now they are gone still no sign of blood. If AF doesn't come in next few days I'm going to schedule appt for blood test.