Does anyone know what my symptoms mean?

I'm 15 and i have a job taking care of peoples kids a cleaning their house i work every day but Sunday and I'm also on dance team i think my sore muscles are from the work outs but i also have headaches dizziness im tired all the time ive been slightly forgetful and haven't been hungry at all and if i do it something it makes me increadabley nauseas ive been loosing weight and vomiting up this slimy green liquid even if i dont eat.