why am i sick ?

For the past week i have had this sick lumpish feeling in my belly when i eat anything like a proper meal , i used to be able to eat a normal sized dinner now i can only eat half and that is me forcing it down. I used to be able to eat a roll and something for my lunch now i cant even look at anything without feeling sick. I dont know whats wrong with me and i am getting a little worried. my parents are getting annoyed because i wont eat my dinner they think its just because ive been eating sweets but i just simply cant eat it , it makes me sick ! what do you think this is or what should i do , i am in need of help ?

[Weesy68]

Things that decrease your appetite and/or make you sick when you eat can be:  Mononucleosis, Pregnancy, GERD, some mental disorders.  There are a lot of things that can cause this.  If you haven't told your parents what is going on, you need to tell them.  If they aren't listening to you then talk to another adult you can trust or a counselor at school.  It could be something minor or something serious so it needs to be checked out.