Pregnancy V. PMS

So my fiance and I have been trying for baby recently, he came in me every day of my fertile days and when I was ovulating, I know I need to wait and see if my period comes or not before taking a test but I just wanted to know what are some early signs of pregnancy and if there's a way to tell between pregnancy symptoms and pms symptoms?

I've been nauseated (haven't thrown up)

Cramping

Sore breast