I was 6 days late on my period witch I am never late . I started on the 7th day witch it only lasted for 21/2 days. So could I be pregnant?

If you are having sex there is always a possibility. However, you did get your period. Every once in a while Mother Nature throws us a curve ball and we have periods that are early or late... too long or too short.

They only way to tell now is to wait until you miss your next period and test using first morning urine.