Hi I and my girlfriend had an protected sex couple of weeks ago and the problem is when I removing my penis from her I saw that some white (sperm colour) sticky, immediately I checked my condom and the condom is perfect good and alright. And more over it was my third shot, I don't know weather it was my sperm or not. On 10th of this month she has to get her date but she didn't get her periods I am worried about that, we did the pregnancy test and it shows negative. I am worried about that please suggest me what I have to do to avoid pregnancy is she pregnant.