I'm so scared, could I be pregnant?

i honestly think you're a little nervous and creating the symptoms in your mind. however, i think if you got your period a week after you had sex, its too early for you to determine if you're pregnant. its possible that you get your period the first time, but now you need to watch for next months period. you are stressed out and it can cause your body to do crazy things like feeling the symptoms of pregnancy (i cant tell you how paranoid i was when i was your age). i think there is a very very slight chance of pregnancy in this case, it really would have to be a freak accident. but if you're not pregnant this time, you need to start being more careful. your boyfriend needs to buy smaller condoms or not have sex if his penis isnt big enough. and you probably need to get on birth control.

If youve had your period since the sex then you should be fine. What you have read about is called implantation bleeding and it is normally very light and not like a period. You are probably just imagining pregnancy symptoms, its really easy to do when you're paranoid about being pregnant. Dont stress, you're fine :)