Missed period

Hi all, my period is always regular 28th day cycle. Sometimes 27th even if miss is also only 1day etc. But now im on my 33rd day alr according to my flo app… Does this means i missed for 5/6th days alr or 3rd day? Could i be pregnant? But i tried the kit and its negative or is it too early to be detected? #pleasehelp #worried