Could I be pregnant?? GAHH help!

Help ladies! I’m freaking myself out. About a week ago ( 8 days ) my boyfriend and I had sex. He used a condom and we literally only did it for like 15 seconds, maybe not even that long. He didn’t cum, and the condom did not break or slip off. Also, I didn’t even go all the way down on his penis. Just like halfway or on the top, my period is due next Sunday (1 week) and i have cramps. I had pre cum and cum on my hands but it was most likely dried or getting dried. And I never touched the very top of the condom, just like the bottom. I was ovulating last week. Could I be pregnant?