Pregnancy or pms?

First things first, hello my name is Esmeralda ☺. I'm new to this app but I've got a few questions.. I had unprotected sex while ovulating which up until now I had no idea what that even was and now I'm terrified that I'm pregnant. First question is what can I do if I get kicked out of my house? I'm 18 and I still live at home with my parents. Second question how do I know if its just PMS? I'm freaking out