could i be

Hi, I am 15 years old and my boyfriend is turning 15 in a few months time. I am very worried as yesterday we started fooling around a little and I had given him a blow job and a hand job and he finished it off but only pre cum had came out, a short while after it came out he had fingered me and I’m starting to freak out thinking about if I could be pregnant! I’m too young to have a baby! I last had my period just before Halloween so it was around 21-29 , can I get pregnant even if it was a small amount of pre cum??