Hmmmm I think maybe you should take a sex ed class before having sex again!!!!! You should know what precum is before having sex!
Just so that you don't have to ask it again let me clarify what it is for you!
Precum, is fluid that comes up before he actually orgasms, it is made up of the same thing as cum and can contain sperm, and yes you can get pregnant from it.
Watch sex talk with susan johanson on oxygen, and her web site has a ton of information for people like you that are uneducated!