Wish I could give you a big hug. I have no idea how Crohns would factor in to this. Vaccines do mess with the immune system. Does your Dr. Know you drink a gallon of water a day? Do you watch your electrolytes? That's an awful lot of water. Please keep us posted here. I know the fear is an awful thing to deal with. I'll be keeping you and your family in prayer. I personally know two people who came through GBS and are now doing fine. One has just a small residual facial paralysis, and the other went on to have three healthy children (one set of twins!)