Hi. First I am not a medical and so you must of course go on the more decisive interpretation of the medicals. This said, my own experience is that you ought to have tried all other options before going for an ileostomy for this purpose. I think sometimes they can jump the gun. But, if your symptoms are severe - you have to weigh the possible worst case situations such as blockage? ... against the difficulties which you will find with a stoma. I have had a stoma twice on a temporary basis in my life and it is not a plus. This said, the equipment has improved to handle a stoma since I first had one on a temporary basis as a child.
So, get a really comprehensive view here; maybe a second opinion if this elective and non-urgent especially, in my view. In my view underlined.