scared—help

So yesterday I had unprotected sex and it was my first time ever even having sex. It sucked. But we tried to “pull out” and I think it was too late. I am still in high school and I’m scared I might get pregnant. I thought about getting the morning after pill but I don’t have any money for it. I’m not ovulating so my chances of getting pregnant are low, right? Please give me advice on what I should do.