You need to practice grounding and shielding many times a day until you can think “ground and shield” and it will immediately come into place. Eventually, you won’t have to think about it at all, and it will continue to be there.
Do one of the following exercises and recheck your level of shock after each exercise or repetition of an exercise to make sure the level is going down and to figure out what works for you.
Part of the process of healing parasympathetic shock is for you to be in touch with yourself and feel in charge of the process since you lost touch with yourself and you were not in charge when the shock occurred. You need guidance to learn this, and you need someone present with you to fully heal yourself. You cannot do this alone. Your system has learned to distance from others in order to survive, and you have to reset it for calm, safe connection. And safe touch helps to keep you in your body and better grounded.
Have you ever heard a sudden loud sound like an unexpected door slam that made you jump? Then you have experienced sympathetic shock. You go into the fight-or-flight response, and the body immediately gets ready to deal with the threat. If fight or flight is deemed impossible, then parasympathetic shock occurs. Your system decides that the best move is to play dead and hope you are not noticed so that you can survive. Your system slows down and quiets itself as much as possible.
Going gluten-free does take time, but it doesn't have to be scary or overwhelming. Taking it slow and starting with certified GF products available at your local grocers will help you gain confidence quickly and set you on the right path. This article should help.