Hi ring - add me to the list of those who went through this too. It turned out to be just a phase, but I was stuck on regret & remorse for a few months. I realized it was self destructive, & keeping me from moving on.
I wanted to be a whole new person, yet I was wandering morbidly around in the past. I had to ditch that way of thinking, and I was able to. Just talking about it takes the sting out of the negative feelings, I found. Keep going - you're doing great.