Invisible Star,
We all have are down moments unfortunately. I have gone months without cutting and then something would happen and I would just lose it. It sounds a lot like what has happened to you.
Just don't get too down on yourself...it has happened but today is a new day and so is tomorrow. All we can do is focus on trying to help ourselves to try to calm down before we decide to cut. It is all that I can do...we might not always be sucessful and that is ok too.
Do you feel in immediate danger? If so maybe you should talk to your therapist if you have one...if not maybe getting one would help?
We are always here to talk about this...Welcome to our forum

Jessica