Are you taking pain meds with codine? They make me itch terribly!
Has your doctor discussed any further testing with you? There are new biliary based contrasts that will allow for functional imaging and this maybe able to indicate the leakage site(s), should they be present.
I'm so sorry to hear about this itching! I know how annoying that is! I'm sure it's to do with your liver, doesn't matter what the tests say!
Are you on a very, very low fat diet? No alcohol, coffee or even tea? No milk at all?
If not, please give it a go and you might get better.
All the best,
Ekaterina