I don't want to scare you anymore than you already are but even if the guy did pull out you still could get pregnant... it is called pre ejaculation and sperm can still be ejaculated into you and unfortunately if it is the right time of the month which most girls are most fertile around day 14 of there cycle then it is very possible that you may get pregnant. But there are options out there. If you are 18 years old then you could always go to the nearest drug store and purchase Plan B (this can be used up to no later than 72 hours after unprotected sex) if pill helps prevent ovulation from happening. If you are too young to purchase this I would definitely talk to your guardian and see if they may be able to help you purchase this.....I know they may be upset but I think that they rather you be safe then sorry. Hope that this helps. I really wouldn't worry to much...relax and everything should be just fine. But next time if there is one....make sure that you practice safe sex if you can with either the pill, condoms, sponges, etc. Good Luck.