If it's supposed to be healing, no, it's not normal.
Have you had an MRI done? I had a lot of what you had, with the instability and reoccurring sprains, pain, etc., and I had torn anterior ligaments, and needed reconstructive surgery. This was back in 2004, so I don't know if treatments have changed and they try to avoid surgery now, and start with a boot.
Have you talked to your doctor about your increasing pain? You should.
I'm sorry you're going through this. I know it sucks.