Namaste Judevine
In my experience I have found reiki has been more effective in emotional, spiritual issues than physical stuff. I can relate to your feeling of disappointment that I have felt when I had to take medications. But I have consoled myself saying without reiki it could have been worse.
Also, I have found that when I am sick, my own reiki has not been as powerful as when I am healthy, receiving reiki from others works better at that time. Be kind to yourself and just experience reiki without attachment to outcomes. Hope you feel better soon :)
Mal
