Hi So My Last Period Ended On June 30th 2015.

Hi so my last period ended on June 30th 2015. Since then my boyfriend and I were sexually active from July 1st to July 8th. On the night of July 3 we had a pregnant scare (the condom slipped a little and some of his sperm slipped out of the top of the condom a little I guess?) so we went to go get the plain B one step pill. I took the pill within the 24 hours it said to. So it had a 95 percent chance of it working. Plus the condoms that we were using had spermicide in them so there was even a bigger chance of me not getting pregnant. So I took the pill and everything seemed like it went back to normal. Just last night though, almost a week after I took the pill, I looked and saw I had brown discharge. Figured it was nothing and went to bed. Then this morning, my lower adominal area started to cramp up and I started to bleed. But the strange thing is that my blood doesn't smell. My blood usually smells when I have my period. So I figured that it would smell now. But it doesnt. I have been have on and off cramping and have been bleeding for almost 24 hours now. I am wondering, could this be the side effects of the pill that I took about a week ago? Or could it be signs of early pregnancy? I'm so confused and need help. If anyone can answer my questions it would be greatly appreciated. Thank you. My age is 21.