I have a Q?

Gail
Last month Feb. 26 i got my period.
Then this month March i should have my Period this 26th or 27th but its March 29th now and i still have no period. My boobs is sore around it. And i feel little crumps in my tummy. Am i pregnant or what? Should i wait till April 1 to get a test? What do you think?