Hello
You may indeed be pregnant. To find out, your first step is to take a pregnancy test which is available at any pharmacy. You are woefully ignorant about reproduction. Your body can indeed send you signals of pregnancy within a few weeks of fertilization.
And pulling out is one of the riskiest activities because men's bodies produce a fluid which lubricates the urethra, and this fluid can contain MILLIONS of sperm. So you see, it's not only possible to get pregnant from using this method, but it's also highly probable.
You need accurate information about sexuality and risk reduction. Please go to the forum for more information about choosing a method that will work best for you:
http://www.medhelp.org/forums/Birth-Control-Contraception-/show/382
Good luck! Dr. J