Question: signs you are very ill?
Answer: Chest Pain. Chest pain could be caused by a number of different factors ranging from muscle soreness to a heart attack. ... 
Abdominal Pain. ... 
Sudden Weight Loss or Gain. ... 
Changes in Appetite. ... 
Fatigue or Weakness. ... 
Shortness of Breath. ... 
Nausea or Vomiting. ... 
Difficulty Swallowing.