Chance or No Chance

My boyfriend and I had sex both Sunday and Monday. He ejaculated in me twice both of those days. My period was scheduled to come the 29th but never came. As of today my breast are extremely sore, I sleep all day, and Im hungry all the time. What can these signs mean? I'm not on any type of birth control and we don't use condoms. I'm very happy I'm not under any stress can my period just be late? When is it best to just take a test?