Hi, if you're regular, you should get your period on february 28th or around then. It's unlikely that you will get pregnant if he didn't come in you (the semen has to reach your uterus, at the very end of the vagina, and then swim up the fallopian tubes) - but he might have come in you a little bit before he pulled out, which would cause a pregnancy. If you're worried, you can always try a drugstore pregnancy test or even go to a free medical clinic in your area for more accurate pregnancy results. The most important thing is that after a scare like this (and i've had it too), brush up on your sex ed and really bring protection. Depending on how well you know this person and their sexual history, you might also want to get tested to stds (again, some medical clinics will do this for free). Good luck! Everything should be fine!