Hi. I went thru periods like that even whilst married. I did things on the internet I deeply regret. I did and said things in cyber space and face to face that made me too feel like a different person. Now I wonder who that woman was. I can say that there is no point in looking back though. It only results in feeling bad and in low self esteem. If it served a useful function, I'd say go ahead and wallow, but it really is pointless. When your mind wanders, reel it back in or distract is as best you can. It's typical for bipolar so feel assured of that. All the best to you friend.