Most women are ignorant of the fact that pre-ejaculate is usually enough to get them pregnant. If you are not looking to get pregnant, I would suggest you talk to your doctor about emergency contraception, and if it is too late, take a pregnancy test to be sure.
ANY unprotected sex can cause pregnancy, even if you used a condom, even they aren't 100% effective as a birth control. Seek medical attention soon for emergency contraception or have yourself tested by a physician to rule pregnancy out.
Yes. A little known fact - Without an Ejaculation from your Male partner, you are still liable to become pregnant without the correct protection. Condoms, Pill, or the Shot. As long as the male you are with is fertile.