Okay girl if you have had sex for the first time and you just know there's no way you could be pregnant then yes you're period delays 10 or more days don't just jump to conclusions because the more you think your pregnant you're body Will give you the symptoms that you are. If you think that you're pregnant go get a test don't wait it and hide and don't wait until ... we'll idk why you would wait. Just remember first time you have sex it delays don't worry to much if you did unprotected and he came in you get a test. Be smart when doing it you don't want to be young with a baby.