Missed period but negative test?

Desiree

Today i am 3 days late on my period. On the first day i didn’t start i took a pregnancy test bc i was like “????” but it was negative 3 days ago but i still haven’t had it so I’m very confused. I’m ALWAYS on time for my period if not I’m only a day late. My period have always been regular. Also I’ve had little cramps and 2 days ago i was super sick- bunch of nausea and vomiting. What’s going on😕