Woooow, this is amazing!
Must have been very intense! It sounds a little scary though, I wonder what exactly happened.
I can't tell you much, nothing like this has happened to me. I do Reiki myself, mostly on myself though, I was initiated in Switzerland a couple years ago. I only have Reiki 1 so far...
All I can tell you is that from your story I do believe that you are a healer and you should not waste this gift!! :)