AF two days late...i need advice.

AF is two days late, today everything makes me wanna puke, especially if I smell something different, it doesn't even have to be gross/bad and I instantly feel like puking. But! I took a first response test yesterday and it came back negative, no faint line or anything..

Could it have just been too early to tell? I only have the clear blue digital tests left, if I were to take one, would it show up on that? Or should I just keep waiting?