It took me well over 18 months before I felt like I wasn't taking things personally that weren't meant to be. The oversensitivity had to be overridden by rational thought and my brain needed to heal enough to be able to have rational thought and then I had to have enough energy to maintain that rational thought. I'm sorry to tell you this, but it might just take some more time before you notice a difference in being overly sensitive. The good thing is that you realize it's happening and that you can hopefully talk about it with people when you're able to. The people who love you and understand what's going on with you (you're recovering from a brain injury!) will forgive you and let it go.