Could I get pregnant?

Tiera
Last night me and this guy made out and things. He didn't go inside me because I am so tight down there...because I'm still a virgin. He never actually got in my vagina but he did rub it there a lot without a condom on and he tried to push inside without a condom on but he never succeeded. He did that for a while off and on. And he also fingered me and ate me out. When he finally came, he did it on my vagina like right underneath my stomach. I'm very afraid that his semen could've possibly got in my vagina and now I'm pregnant.... I don't know if that's possible, is it? And if so should I get the pill? Maybe I'm being paranoid because I'm so scared. Honestly, I had no intent for things to go the way they did. I told him I didn't want to do bad things but he started in on me and it started to feel so good, I couldn't resist even though in my mind I knew it was wrong. Also my period should start any day now. My last period was in like the beginning of September. I'm not sure on how likely it is to get pregnant right before your period....but I don't want to be right now. Please help and give me some advice?