Pregnant???

So my boyfriend is really weird about things and loves to joke. 2 and a half weeks ago we had unprotected sex and it just felt different that time. I asked him if he came in me maybe even precame and he told me no, but last week while at a ball game I asked him to go get some candy and he responded with "Dang, craving already." And then continued to make pregnant jokes. As I was panicking he just kept laughing. This continued for about 30 minutes and then he was like "I'm just kidding, chill out" and that ended the whole topic of discussion. I'm two days late on my period and it's usually dead on time. I'm absolutely terrified. Any advice???