Hey Hun. You are taking all the right steps. Working with a therapist, learning new coping strategies, but this took time to manifest and it is going to take even more time to resolve. Take it one day at a time. You will have good days and bad days but the bad days don't mean you fail. They just show you you still have more work, but I am sure you already realize that. Don't focus so much on the fact that you slipped, acknowledge and and move on. Work on finding other coping strategies that make you feel good that are not destructive like running or painting or something. The only thing I would talk you is to tell your therapist that you are cutting and when you do. If the course of therapy needs to be changed then they can only know that with all the information. Keep up the good work, it is hard but you are doing it! Best of luck