I was supposed to get my period March 4 but still haven't got it I took a pregnancy test on the 6 two days later and it…

I was supposed to get my period March 4 but still haven't got it I took a pregnancy test on the 6 two days later and it came out negative not prego but I still haven't got my period don't k ow if my period cycle is changing for the last 5 months I have been getting it at the same days but not this month don't know if I'm prego or my cycle changed I'm gonna wait to see till the end of the month to take another test but I'm hoping I'm prego I really am