Sulfer Burps - Connected to Liver Issues?

Both my friend and I have been experiencing sulfer burps, excruciatingly painful cramping, diahrea and vomiting episodes and we cannot seem to find an explanation.  I have had mine off and on for years once or twice a year.  The episodes usually last about one to two days after completely starving myself and expelling all things from my body before i find relief.  My friend's just started a few months ago, but she has had hers much more frequently (once a month).  Same symptoms and all.

We both found it odd as well that we both were diagnosed, while pregnant, with a very rare liver issue (ICP) which causes the body to over produce bile and it begins to dump it into your blood stream.  We started to put all of our facts together regarding the sulfer-burp issue and we are wondering if we have some sort of liver function issue that happens due to hormones (during PMS) or in general that would cause bile to build up in the stomach causing some sort of breakdown of digestion process...

These episodes are barely manageable, unpredictable and it seems to be very evasive as to what it is.  Both of us have been to the ER on numerous occasions only to be sent home with an IBS/Crohns or fecal impaction diagnoses.  It is very frustrating and we were hoping to get some guidance here.  

We both are pretty positive it is not Giardia.  We both have reviewed our diets before the episodes and found nothing abnormal about them.  The only common factor that seems odd is the liver issue.  The fact that most of what we expel during these episodes, out both ends, is very bile-like.  We also seem to throw up EVERYTHING that was within a day or so of it starting and nothing eaten after gets by either.  

I hope this is enough information to get this question somewhat answered...PLEASE HELP!