Dear Basma,
1) GNM is a full concept of biological conflict and repair mechanisms. META-Health is trying the findings that belong to the GNM concept, comparing and completing them with more findings, such as the Polyvagal Theory, neuro-psycho-immunology, NLP, resonance and quantum theory, energy psychology etc to research and teach the principles of holistic mind-body-social health. As you read in my comments in Björn Eybls book on GNM, I don't agree with every single statement (especially on microbes and the immune system), and I use a different way to describe and explain their behaviour. I find it crucial that we keep an open mind and are willing to discuss different perspectives that lead to comprehensibility, meaningfulness and resources according to Salutogenesis.

2) The process of conflict and regeneration does not mean that severe symptoms cannot be lethal. That depends both on the severity and length of the conflict, and on the circumstances of healing. As I explained yesterday, certain circumstances such as simultaneous conflicts in several organs can reduce the capacity to regenerate easily. This is why we need to look at the whole picture to reduce the "conflict weight" and to optimize circumstances as far as possible. Dr Hamer recommended cortisone to be used when we suspect a dangerous healing peak e.g. in heart tissue to happen. In my own practice I never experienced heart attacks to happen when doing inner work on the related conflict.

3) The meditation exercises are different for everybody, and whatever happens is right. You don't do it wrong even if you have to yawn. Your body may want to show you something else than you expect, and that's fine! So just take note of whatever it is that comes to you, and don't compare yourself with others.