Please go to Women's Sexual -Health to the post by Kia. It is toward the top of the page and she will give you all the information that you need to know about pregnancy. She is knowledgable and kind.
Yes, precome actually can be a 27 percent chance of pregnancy.
I know guys refuse to believe that if they didn't ejaculate into a woman, how can they possibly make a woman pregnant? It is the denial thing, because pull out is not a method of birth control.
There are a lot more things to be concerned with than just pregnancy. Believe me. I learned the hard way. You can get HPV from a man who tells you he is perfectly clean. Like Georgia says, ask and demand to see the lab results.
Good luck and hope it all works out well for you.