am I pregnant?

G

My boyfriend and i have never had sex but about a month ago, he came and then fingered me. I was very paranoid that he might’ve gotten me pregnant so I took plan B 1 step. I got my period about 2 weeks later. But now I am having fatigue, headaches, a little bit of small cramping every now and then, and I feel nauseous. Is there a chance I am pregnant even though I got my period already?