My bridge bunny developed these same symptoms very suddenly. It was just the worst thing ever seeing him rolling. Dee definately needs metacam twice a day for the inflammatory properties as well as pain relief. My vet who is a rabbit specialist diagnosed Pasterella in his right ear. He made a full recovery over 5 weeks, but at his worst he was on IV fluids at home, having all his meds, syringe feeding every 2 hrs, being kept clean and turned every hour around the clock, because he was collapsed and unable to move. The turning was the same as you would people to prevent pressure sores. My vet also gave him meds to help with any dizziness he might have been experiencing.
Later on in his life, Roger had a stroke which left him immobile, and paralysed down his right side. I was only able to provide him with all the ongoing care he needed and a good quality of life, because my boss agreed to me taking Roger to work with me, and setting him up an enclosure in the mess room. If that hadn't happened, I would really have had to have him pts, because his quality of life would have been extremely poor. At work, even when I was out on jobs, the whole workforce constantly doted on him and fussed him, and he was really never left unattended.
I really do hope you feel a lot more positive after seeing your usual vet, and I hope Dee goes on to make a full recovery. It's probably best with bunnies in such a compromised position, to just take one day at a time, and make sure you take good care of yourself as well, because Dee MAY require intensive round the clock nursing like Roger, and everything else such as housework etc, may well have to take a back seat. You need to be realistic about what you can do each day, and bear in mind you may need to nurse Dee for some weeks.