I remember the loss of inhibition from my head injury. Let me know if I am misreading your message. Some is waiting for the brain to heal, but setting new habits helps. When things would happen, I would work on waiting a few seconds before reacting. Even things like a person asking you a question, because you are retraining your brain. It takes time to reset, but worked for me. Talking with a therapist that specializes in head injuries would be good because there are likely other tools.
A couple of months after my accident a friend and I drove to a national park. A woman stopped her car in the middle of the lane. Instead of waiting for her to move, I drove around her (I wouldn't have done this pre-injury). No incoming cars, but it was a double yellow lane. So, the parks police stopped me and gave me a ticket for illegal passing. He was showing off to an understudy and was very condescending. I mailed in the check and ticket, but did call his supervisor and suggested he talk to visitors in a more respectful way. They lost the check and didn't contact me, instead a Federal Marshall called me from Salt Lake a few months later and said they is a warrant for my arrest. We talked, and I sent in a new check and made sure it was cashed. Another problem with head injuries is some people treat you differently. I'd never been treated like a bimbo before. I hope you have a good support network, because most folk don't realize what level of hell one lives in with a head injury.