I am not a doctor but i am a survivor of this dreadful desease.....if your at all concerned about your symtoms then please dont delay in going to see your doctor....sudden weight gain can be a symptom (over a month or two) as can weight loss... abdominal swelling (tightness) as in pregnancy.....abdominal pain and if the liver is affected pain in the right shoulder.... gas can also be a symptom.... and upset in bowel movements... you know when something just doesnt feel right... you know your own body.... best to have your symptoms thoroughly investigated... good luck