Over 2 weeks late , No Positive tests!?

I have never been this late before! I've took around 4-5 tests over the past 2 weeks and they have been negatives. The only symtoms I've had is Hot flashes, cramping here and there , and just got a sore throat & stuffy nose. Also I've heard that the father of the baby could get symtoms.. My fiancé told me that he was throwing up last night and that he has been eating more lately. I plan on going to the doctor soon if AF don't start but has any of you ladies been through anything similar? Really would like the hear your guys stories.