It sounds like you need to get away from this family.
everyone has issues with their parents when living at home. i left because of it too and now my mom is my best friend.
You need to move out.Period. Find a roommate,rent a bachelor apartment. walk to work,take the bus whatever.
Your family is stressing you out and I think that is what is keeping you from getting better.
Do you have any other family you could move in with and pay rent to?
I really think you bounce from solution to solution and never really give anything a chance. And just for clarification,just because Heather has something in her book that says its IBS safe doesn't mean it is safe for YOU. You need to get back to a basic diet and stabilize yourself.
but first get the heck outta that house. IMHO
-------------------- IBS-D since 1999...mostly stable..i do cheat too.Bad me.