If you can get a handle on your choices of what you eat and really commit to following EFI diet faithfully I think you will see an improvement in your symptoms.
The way you are eating now is making you miserable, and you have nothing to loose by giving this diet a fair chance. You are going to have to find the will power to resist the foods that are making you feel sick. I think you also need to find something to take your mind off of IBS during the day. It is not helping to sit around and think about going to the bathroom all day. If you are home and end up having to go several times during the day try not to stress about it, just go when you have to go.
Wouldn't it be wonderful to take 3 days off to do something fun instead of taking a laxative to clean yourself out?