What are the odds? Pregnancy from precum or paranoia?

So about two weeks ago, I was hanging out with this guy that I really liked at his house. We started messing around and such. Long story short, I ended up giving him handjobs and blowjobs. He didn't ejaculate but he did let out some pre-ejaculate which inevitably got on my hand. He told me to finger myself so I did. It was for about 10-15 seconds and I barely went in more than inch or two at the most. It wasn't until he asked that I realized I was using the same hand that I had used on him and I stopped after that. He also fingered me. Knowing him, he could have had some leftover sperm on his fingers from earlier.. activities that he did before I arrived. (He's a total pervert, I regret seeig him now. He totally used to get what he wanted) I've strained my memory and I really can't remember if my fingers were wiped off on anything before I fingered myself. I'm trying to look at this logically. There isn't much sperm in precum and whatever was on my hand was mixed with saliva obviously, too, but I don't know if that makes a difference. It was near my ovulation, give or take a couple days. I'm absolutely freaking out that I could be pregnant, though I'm trying to stay calm so the stress doesn't make my period late, in which case I'd just freak out more. I'm due for a period literally any day now. I've been having some light cramps on and off the past couple days, along with tender breasts and minor lower back pain, all of which are regular pms symptoms for me. However they're usually stronger than this and I've also read that those are also early pregnancy symptoms. My friend is bringing me a pregnancy test within the next few days. I just need some peace of mind until then. I'm young but not going to say how young because the last thing I need is to be judged right now. Someone just please help me, my life would be ruined if I was pregnant. My family would hate me, as we're going through enough as it is. Any advice? Can you get pregnant from precum? I'm eager to accept any knowledge on this subject that you have to share. Thanks so much!