I feel so badly for you. You live in more pain than joy, tormented by more than IBS! How I wish I could just hang out with you tonight, keep you company, distract you from LIFE as you experience it.
Just out of curiousity, have you tried the diet for Delayed Gastric Emptying? It is different from Heather's in a lot of ways. The residue is further reduced--IF is highly discouraged. It's high liquid/electrolyte. If you have delayed Gastric Emptying, all the SF in the world isn't going to do you any good--it will just make you feel uncomfortable and sick! IF will just give you cramps! You should do some extensive research in that area and think about trying the recommendations!
I'm sorry. I know nothing. What can I say other than...when I feel beyond life itself I usually sleep it off. Sometimes I need a "Big Chill" weekend. It hurts to hear that you are in so much pain as you are such a sensitive and giving person. Your loneliness/aloneness is so sad.
I'm a former anorectic, too, incidentally--or at least in remission for years.
I hope you sleep well. Your first and foremost in my thoughts tonight.