I reckon, avoid the hospital for your own sanity, and just call the doctor back and make him/her understand that you are really worried and you want to understand better what's happening and how you can manage it ...don't let them fob you off.

Secondly ....and this is just something I would do ...go to a nutritionist or natropath and talk to them ....perhaps they might recommend something that's gentle for her and for you.