.
I once went 7, almost 8 weeks drinking only 3 glasses of water a day, just to get my pills down... and drinking water felt more like I was eating the glass. A real nightmare.
Kev - do you mean you went almost 8 weeks with no food? What did you live off?
Kikidee - Although I've never got to the point you are at, I've always been able to keep food down, I have never found diet to help me much. If I avoid too much fibre, I feel a bit better, but even with that I can still be really really sick. The benefits I can achieve through diet are minimal.
I had seen dieticians and nutritionists before - I never found them helpful, they all gave me wrong advice. They have certain guidelines about what will help people with digestive problems. However, if your symptoms and reactions to food don't conform to the norm, following dieticians' advice is obviously not going to help.
For example, something that applies to quite a lot of people with digestive problems is that they will feel better giving up dairy. But if dairy is no problem to you, then you're not going to feel better cutting it out. There's no way to know which pieces of advice apply to you without trying them. But then why would you need a dietician? You can go online or ask on this forum and find all the commonly given pieces of information - eat little and often, don't eat too much fibre, avoid overly rich foods, drink plenty of fluids, etc. etc. etc.
This kind of generalised information provides ideas about things to try that might help, but never guarantees it will. It sounds like you've experimented with diet enough to know all these things for yourself already.
The only reason I can see that someone might benefit from seeing a dietician is if they have trouble sticking to a diet and find having someone to be accountable to and to encourage them helpful to have.
It sounds like your disease is way past the point where diet could make any kind of significant improvements. It actually sounds to me like the dietician was quite sensible to admit that she can't help you. I know that hearing you need more extreme treatments was not what you wanted to hear, but I do think it's better than if she had claimed she could help you and sent you off with some useless meal plan which would only mean you got sicker. Tube feeding may at least keep you healthy and nourished while your doctors try to get your disease under control.