I can certainly understand your concern about the possibility of surgery. Surgery tends to bring out the worst fears in us all, doesn't it?
Since you indicate that you have been feeling better on the Entyvio, have you sought a second opinion to determine if surgery is your only answer? If not, please seek out a second opinion from a GI specialist who specializes in this type of problem. It might be good to get your second opinion from a multidisciplinary medical team like a university medical center or a place like Mayo Clinic (Mayo has 3 locations in Minnesota, Florida, and Arizona).
Will you post again and update me on your progress?