I'm 24 and have been experiencing the same thing. I am not hungry at all and have to try and force myself to eat. Then I tend to throw up my breakfast (I can keep my food down the rest of the day). I used to eat a lot. I have even lost my sweet tooth! I dont even want to bake cookies anymore, and that is so not like me. I dont know what is the matter. I am not stressed or anything.
I see this post was over a year ago. I hope you recovered