Pregnant?

So my “friend” and I had sex one night I was a little tipsy, but it was more than once. Our birth control is the pull out method, however I’ve been feeling every symptom of pregnancy for the past week.??? Is it really possible to get pregnant from pre-cum? Also we recently decided to use a condom and it came off slightly inside me... so there could definitely be a possibility,.. right? I’ve taken 3 pregnancy test and they have all said negative however it’s still may be early... advice?? Or insights? I have one child already