pregnant or not

Ladies, about 2 weeks ago my boyfriend fingered me and I gave him a hand job and he cummed. As I was giving him a hand job he told me to spit in my hands which I did and when I went to jerk him I noticed white stuff at the bottom of his dick. After he cummed I helped clean him up and I tossed the paper towel in the back end of his truck and then I had to itch myself then I washed my hands with a bottle of water. My boyfriend and I are so worried there is a chance I could get  pregnant??? I did get my period a few days later!!  Please ladies help!!!