YAY Dej is home! I am so happy to hear it. I had a funny crappy sister story and no one to share it with

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As for the "MS did it" excuse, every doctor seems to know exactly what is wrong with you until they see you have MS and then all of a sudden it is MS. I don't know about tummy, but I do know that the MS caused hole in my spinal cord caused my bladder to stop working (like it just isn't getting the signal from my brain telling it how to empty) so I don't think it is too far fetched to assume the same can happen to other organs like your stomach.
Hope you are feeling better and back to eating real food soon.