If Remi worked for you, I would try it again. As for insurance issues, ask the dr. if he can contact your insurance and tell them it will be much cheaper to pay for the Remi than pay for all the things that you may need if you don't get the Remi (hopital stays, surgery, etc).
Someone else mentioned that you could have a reaction if you try Remi again. This is true, but I would still try it. Also, it may work, but not as well as last time. But that happens with most drugs for CD. Over time (and starting and stopping therapy) they lose efficacy.
Good luck getting this issue resolved. We all know what it's like to be in limbo.