So my boyfriend and I just had sex today and he said he came in me , but his penis wasn't all the way in my vagina , he also pulled out, could I be pregnant?

You had unprotected sex--YES, you could be pregnant.

WHY are you two not using birth control? If you are not trying to become pregnant please go and get on birth control.

So, uh... you do know how sex works, right? I mean, you know how babies are made and all? Because unprotected sex is kind of the way it's supposed to work so... YES YOU COULD BE PREGNANT.

{moved from Teens}

Any time there is penile insertion, even only a little, there is the risk of pregnancy. You can reduce the risk, but not eliminate.

No one should be engaging in sexual intercourse unless they are fully prepared to have a child. Especially teenagers.

Yes you could be pregnant and it doesn't sound like you're anywhere near ready for it.