my body is so confusing

So I am a normal cycle person.. Like clock work every 28 days.. Last month I started October 18th and glow said I should of started yesterday still no sign... I have had no sign of period no sore breast like normal just breaking out but I was breaking out last time I was pregnant.. I feels slightly queasy in the morning.. Slightly I took a pregnancy test yesterday and it said negative anyone else gone through this?