Sore breasts and emotional and No AF

A certain AF is 4 days late and not even sign of spotting yet, even before I was late I noticed my breasts were super sore and still are and I've been extremely emotional for the last couple days. I'm really hoping I might finally be pregnant but idk if these are even symptoms for pregnancy...I know some people say it's symptoms for AF but it's not here and I've never had those symptoms for it before. So idk and I don't know if I should take a test or what.