Pregnancy symptoms? Please Help?

Okay so I am on birth control but I missed one pill saturday night but took it Sunday with my other. I had sex Tuesday but did use a condom. It is now Tuesday (2 weeks later) and my period should come tomorrow but my boobs have been very sore which is unusual and have been since Sunday. There are also little red marks that look like broken blood vessels on them. Would I really be getting those symptoms within 2 weeks of sex? Are my chances of pregnancy high right now?