I would definately keep bugging the hospital, this really doesnt sound good and I recall reading your post a few days ago about this and you've been suffering with this for too long, I really hope you feel better! Good luck
This condition is called ascites. I'm sorry you are so uncomfortable.
http://www.chw.org/display/PPF/DocID/22822/router.asp
this sounds life threatening to me, you could develop peritonitis or septismia both very bad...dont mean to scare but i would demand answers from the doc. if you are feeling very bad keep bothering the hospital....they will have no choice but to treat you