Sigh. I have written to two other women today who have had exactly the same experience as you--that is, they were unaware that pre-ejaculate (or pre-***) can contain millions of sperm. Many women have become pregnant because of this ignorance.
Please get a pregnancy test from your local pharmacy so that you can determine your status. Your next step is to learn more about risk reduction on this MedHelp page:
http://www.medhelp.org/forums/Birth-Control-Contraception-/show/382
It's time to select a form of risk reduction which will be effective, easy to use and affordable. Best of luck to you. Dr. J