Don't beat yourself up. You reacted to a horrible hurt. It was instinctual, a way to protect you from the hell of knowing that the one who was supposed to be protecting you was actually hurting you.
It is great that you now have reverted back to the real you and not the one they forced you to become.
It is possible to do some damage control if you think it necessary and to counteract what you did put out there. Possibly a followup message to these people stating what you just stated here....the pain of this further betrayal made you act in a way that is not your true self and that you wish you had not lashed out to people who were not the actual ones that hurt you and damaged you. That being said, it is not your responsibility to protect the cheaters.