lost appetite?

Nakita • 30 years old, Married Baby 1- June 2015, Baby 2- October 2016, Baby 3- March 2018! Baby 4 October 2019

This is so weird but if I eat lunch I feel sure sick and gross around dinner and don't want to eat anything... I have gone four days without eating dinner! I eat breakfast and lunch and then I just can't eat anything else! I never had this with my other two pregnancies