Is it possible to get morning sickness 4weeks pregnant?

Mumma of Axel 💛 • After being together nearly 6 years me and my better half have finally got our little baby. A perfect little boy called Axel born Sunday 23rd July 2017 at 7:08am 👶💙! He is our whole world 🌎
Im about 80% sure I'm pregnant as i never throw up ever before my Af. I always get sore boobs before my Af but this amount of soreness is nothing ive ever felt before wow they hurt. Just want to know your ladys stories on this early morning sickness as its making it impossible for me to eat as it lasts all day. I havent even missed my period yet but with all the other signs im experiencing its got to be pregnancy ahaha its my first pregnancy too so everyones storys and advice would be extremely helpful!!!