Hi there and welcome. Well, you say you had safe sex? What kind of protection did you use? If you are late, I must say that you probably should take a home pregnancy test which you should be able to buy (depending on where you live in the world). You urinate on these and they are pretty accurate for picking up hormones related to pregnancy. Birth control can occasionally fail sadly (although still should ALWAYS be used so good for you for doing so)-- so you need to take a test sweetie.
good luck hon and let us know the outcome.
Are you felling something? Make a lab tedt for beta hct...