It's taken two years, but mine is near enough back to normal, now. I avoided the doctor, and went by instinct...

I kept it moving as much as I dared, and I believe that is why I've got full movement back. It's a little weaker than it used to be, but gradually becoming stronger.

There was a very worrying phase about a year or so ago, where I'd wake up in the morning to find it locked in the 'clenched' position, and it would often be as much as ten minutes before I could straighten it. That seems to have completely cleared up now.

Whatever works for you...

Good luck!