The brain never recovers to 100%. It may recovered to an appearance of 100% but it will be less tolerant to stress. When under stress, the less than 100% recovery may be evident.

You are far too early in your recovery to be worried about how much you will recover. You may recover to 99%. Nobody can predict how much you will recover.

What specifically are you afraid of ? Plenty of people live full lives with residual symptoms from a brain injury.