
I'm sure getting a rollator was a blow. It's how I felt when I got my handicapped placard. But then I adjusted my view--I got it because I needed it and I use it when I must. Sounds like you do, at least for now.
Don't have trouble walking right now, but I did in 2003. Now it's fatigue that gets me the most.
So things do get better sometimes over time. Hang in there and see if it does. If not, look on the bright side--at least you're still mobile. Being able to get around on your own steam isn't a bad thing. So use the rollator to your advantage and keep yourself as mobile as you can.
Still, I know it sucks to have to deal with problems like this. I'm in PT right now for my back. The nice thing about PT is that you can learn things to keep you safe and healthier.