Your body is beginning the task of clearing out old programming and patterns of behaviour. All emotions are a variety of vibrational frequency and past emotional memories are stored in the muscle, tissues and organs of the body, as those frequencies. Situations and people can be triggers precisely because they are stored and not released at the time they happen.
As your body is now in the process of evolving to a new crystalline structure, it has to clear out the old. These old patterns are like toxins to the new body and must be removed before the body can begin physically changing. The best way to get them out is through physical release. This is where ‘the flu’ comes in.