just from your original question and what you have posted concerning meditation, yes it is probably your own "aura", if you want to call it that, to be more precise I would say its your spirit energy. (Reiki actually means moving the spirit, or spirit energy, depending on the translation).... the energy can supposedly be manipulated and used for healing along with other purposes also, depending on who teaches you or how far you take it...... but, now, not actually knowing you or your story, life, everyday situation etc... that could be a different story altogether. outside influences, interests, dabblings, and such could be the cause. as I said, I am just giving my thoughts on your posts as they come...lol.... I do find this interesting though as most ppl will never get to this point with self meditation without a teacher. just breathing exercises are a good start and can be beneficial but few would reach this on that alone....