HOWEVER...when i was there, my parents helped me out. It was rather funny. Now, this doesnt have to be your parents, it can be any close friends or coworkers who know about your problem....
Ever see a movie where the baby makes its first contribution to the little potty..."look mommy, i made a poopy"..."GREAT JOB! You're such a Big Girl/Boy now!!"
have them do this for you. just have them cheer, or clap or simply discuss funny things about poop that everyone knows. like the types, the sounds, the embarassing moments at the public sink haha. You have to reteach yourself like you were a child learning to use the toilet.
SERIOUSLy...it HELPS!!...i was so relieved that i had no panics, we joked about it, we cheered and laughed...and now...my boyfriend and I joke about poop and have flatulence wars lol.
Also...read the children's book.."Everyone Poops"....this is a recommendation from my Psychiatrist. You really do, i STRESS THIS...RELEARN everything. you have backed yourself into a corner, taken away your human right to poop...you must TAKE IT BACK!.
GOOD LUCK!!!!!!....im still making more and more progress!!!!!!