I have been sick for about ten days. this morning i threw up and it was green and it consisted of mucus and a little bit of blood, what should i do?

Seek Medical review: Nausea and vomiting can be from problems in the bowel or outside the bowel including ear or chest infections, migraine, side effect of some medications, central nervous system problems and pregnancy etc recurrent vomiting can lead to dehydration, loss of sodium and potassium from the body and also loss of acid so the body become more alkaline and tears in the stomach leading to vomiting of blood

Gastritis : It sounds like you may have a viral gastritis I was just resting your stomach by going onto a clear liquid diet for 24 hours if you continues to have discomfort it would be worth trying an H2 antagonist such as Tagamet. Ifyou still continue to have symptoms and you need to see a physician to get a definitive diagnosis