for the past couple of days i have felt sick, physically thrown up once, but have sever loss of appetite, tried 2 eat but just can't, now feel week and light headed. mainly had sore lower ribs and felt higher abdominals tight, like someone has a rope round my lower ribs and is pullin it tighter and tighter. i just don't know what it is, do you have any clues as to what it could be plz?