Period help

My period is late. I came on the 7th of June and usually have a 30 day cycle. When I didn't get my period I waited two more days on the 9th and took a pregnancy test. The test came back negative. I updated glow and it recalculated that my period would start 2 days from the 9th, and today being the 12th still nothing after 5 days of no period. I'm nervous. What do you guys think?