What to do???

Ok guys, so I recently joined glow six months ago when we decided to stop using birth control. I had been on the pill for around 5 years, stopped on Jan 1. Since then, I have had extremely regular periods and glow has been very accurate with my cycles. But this month I am 14 days late as of today!! I have taken a few tests and they have all been negative. I am unsure if my body is adjusting to being off the pill or maybe I am actually pregnant? Does anyone have any suggestions? Thanks!!!