Ok So I Had Sex For The First Time On

Ok so I had sex for the first time on Friday, we did it 2 times. We had a condom the first time and he pulled out the second. Then the day after we did it again 2 more times, but he pulled out again. Then about 45-50 minutes later we went and I bought plan b and I took the two pills immediately. I am 177 pounds and I was supposed to get my period on the Saturday but I didn't.
It is now Wednesday and I still haven't gotten my period. I have a white, milky discharge, semi cramps since Sunday and I am FREAKING out that I am pregnant. But my friend had the same thing and said it was fine for her.