Almond, you have a sticky situation.
Your fiance is disfellowshipped.
You are free to remarry on scriptural grounds, but not legal grounds. This pledge of faithfullness, I would be surprised, may apply in your case. If the Elder comes back and tells you that it doesn't, then that is your answer about that loophole.
Go home and hug your fiance, and tell her that you love her forever and you both will ride out this crazy world. Then when the planets allign, you will get that paper.
Cheers and please send me an invite to the wedding, eh.
I'll bring you a great gift, and I love Karoake.