OK so me and my guy got into it yesterday, and he was inside me. And usually when we are doing it he can tell when he needs to climax and he pulls out. This time he said he was going to so we pulled out, but nothing came out of him, only a little bit. So my thing is could he have released in me and I just don't know it? And could this result in me becoming pregnant? Because I think I'm like one or two weeks away from my period.

It is very possible that he ejaculated inside you and you were not aware. You can get pregnant using the pull out method. Your chances are not significantly increased with this experience, as you aren't taking any procautions to prevent pregnancy.

If you are scared you could be pregnant, it is time to protect yourself and figure out your birth control options.

Since it was just yesterday, you could look into using emergency contraceptive like Plan B, but you would want to get it today. Odds are in your favor that you won't become pregnant, but it certainly is possible.
You'll have to wait and see what happens when your period is due.
Do consider some other form of birth control for future use.