4dpo symptoms??

Amber • Husband and I have been ttc #1. Cant wait to have my own little family. ♡♡
I am currently 4dpo with dull cramps in my uterus and it will also spread to both my ovaries at the same time. I am also having lower back pain. could these be early pregnancy signs or is it too early?? AF is not supposed to show until 20th