Hi. It is not clear from your statement that you have undergone required investigations or not. If not than it is required to get investigated by neurologist
as such symptoms , just not get vanished by head injury
. If you got investigated and all is well and you are not having your previous symptoms than you must be feeling all this due to sudden change in your baseline behaviour. As you are not use to such self you are feeling not being your self. All you will need to visits a psychologist
who will help you with therapy to deal with this change . With in some sessions you will be able to see the difference in your situation.