If its a period, then no you aren't pregnant.
Like pp said, there's plenty of things that can cause a late period.
Lots of stuff can cause a late period, such as stress. If you tested before your missed period, you're likely to get a negative. It's best to test after you miss your period.
I took on b4 my missed period negative & I went to the doctor negative too I have to go to the,bathroom very often bhut if im,not why is my period late
take a test. thats all u can do.