NAMASTE, Once you recieved your attunement, it is for life. You mentioned that your reiki felt stronger. Remember you are REIKI. Start your self treatments and meditate on the REIKI PRINCIPLES. A re attument is always pleasant but probably not necessary. I will send you some dsitant REIKI healing. I could also do a re attunment via disatance if you wish. Let me know and we can arrange it.
LOVE AND REIKI BLESSINGS
RALPH