history: I got into an argument with my brother. I said things I shouldn't have said. I got into a fight with my brother this weekend. I said some things I shouldn't have said.  if you regret what you did you should go apologise for you said to him!
current: I did apologize but I still can't shake the feeling that I went too far. I'm not proud of how I acted at all. 
next: i hope he can forgive you and help you forget about what you said.