Healing comes in many forms and in many areas. We can heal body, mind, and spirit. We can use energy, food, changes in thought patterns, stones, water, plants, and prayer to heal. Always, we can revert to square one if we return to unhealthy thought patterns and unhealthy ways of living.
It was not for the Reiki practitioner to say that stopping treatments would cause reversal. It would have been propere to say that healing the whole self takes time.......dare I say, A life time. It is always our choice to continue healing or to revert back to our old ways.
As for making you ill, either this person was not good at keeping her energy system seperate or it is possible that your energies conflicted. We have all met people we just cannot stand to be around. They can be real good people. Our energies just do not mix well. Still, it was up to the practitioner to keep the energies seperate.
Reiki is a lifetime healing. Maybe you should look into learning Reiki.
blackearth